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Microsoft

Identifying threats inside your organization and their potential impact - whether a compromised entity or a malicious insider. Elusive threats like zero-day, targeted, and advanced persistent threats can be the most dangerous to your organization, making their detection all the more critical.

 

The UEBA capability in Azure Sentinel eliminates the drudgery from your analysts’ workloads and the uncertainty from their efforts, and delivers high-fidelity, actionable intelligence, so they can focus on investigation and remediation.

As Azure Sentinel collects logs and alerts from all of its connected data sources, it analyzes them and builds baseline behavioral profiles of your organization’s entities (users, hosts, IP addresses, applications etc.) across time and peer group horizon. Using a variety of techniques and machine learning capabilities, Sentinel can then identify anomalous activity and help you determine if an asset has been compromised. Not only that, but it can also figure out the relative sensitivity of particular assets, identify peer groups of assets, and evaluate the potential impact of any given compromised asset (its “blast radius”). Armed with this information, you can effectively prioritize your investigation and incident handling.

 

How to enable and use the new UEBA capability

In your Azure Sentinel portal, navigate to the Threat Management menu, and select Entity Behavior (Preview).

 

Sync users from Azure Active Directory

Syncing your Azure Active Directory is required for creating profiles for the users and entities in your organization. 

AAD-Sync.gif

 

 

Enabling users syncing from AAD 

Selecting data sources for insights & anomalies

Once users information is synced from your Azure AD, and in order to start profiling user activities 

you need to select which data sources will be profiled by our UEBA engine.

We currently support

  • Security events (Logon events)
  • Azure Active Directory Audit logs
  • Azure Active Directory Signing logs
  • Azure Activity logs

Data source selected will be processed, enriched and profiled by the UEBA engine.

 select-data-sources.gif

Select data source to be enriched, profiled by the UEBA engine to find anomalies

 

Investigating user and entities

 

Entity Pages

When you encounter any entity (currently limited to users and hosts) in a search, an alert, or an investigation, you can select the entity and be taken to an entity page, a datasheet full of useful information about that entity. The types of information you will find on this page include basic facts about the entity, a timeline of notable events related to this entity and insights about the entity's behavior.

 Entity-page.gif

searching for user and accessing the user page

 

UEBA Workbook

We've released a UEBA workbook, focused on user investigation - based on related incidents, alerts and anomalies.

The workbook provide easy viability to the SecOps analyst about the top user to investigate, whether they're suspected as compromised, or whether it's an insider threat scenarios where user actions deviates from his profile.

All of our anomalies are based on real life attack scenarios, mapped to MITRE ATT&CK framework.

Each anomaly is scored with “Investigation Priority Score” – which determine the probability of a specific user performing a specific activity, based on behavioral learning of the user and their peers. Activities identified as the most abnormal receive the highest scores (on a scale of 0-10).

 

UEBA-workbook.gif

UEBA Workbook

 

Advanced Hunting

Hunting over raw data is something tier 3 analysts or hunters love to do, but sometimes, even simple hypothesis such as:

"Helpdesk user, with high impact on the org, performed some anomalous resource access"

are really hard, or even impossible to do on raw data.

By enriched the data, and storing it back into the customer own log analytics,

Hunters can run complex queries with ease – and have contextual and behavioral information embedded in them– where all the “heavy lifting” of the analytics is done in the engine in the back.

In addition, all our anomalies are available at the 'Hunting' blade.

Hunting.gif

Hunting queries over data enriched with contextual & behavioral information

 

Guides and feedback

The “Guides & Feedback” panel provides guidance on how to maximize the use of the UEBA feature It also gives you the opportunity to share your ideas and experience with our core engineering team and vote/add your ideas on the Azure Sentinel user voice platform.

Feedback.gif

Guides & feedback

 

These are just a few highlights of Azure Sentinel UEBA. For a full list of the functionalities and the step-by-step instruction on how to use a certain feature on there, please refer to the documentation.

 

Get started today!

As you can see, enabling Sentinel UEBA is super easy! We encourage you to try it now and start hunting for insider threats and compromised user in your environment. 

Try it out, and let us know what you think!

 

You can also contribute new connectors, workbooks, analytics and more in Azure Sentinel. Get started now by joining the Azure Sentinel Threat Hunters GitHub community.

2 Comments
Occasional Contributor

How to you turn OFF UEBA? Once you enable it, the configuration window goes away so you can't go back and change your log source settings!

 

Occasional Visitor

@bobsyouruncle You can disable it from the settings menu. Goto -> [Configuration] Settings -> Settings Tab