Adversary-in-the-Middle (AiTM) phishing attacks represent an emerging and concerning trend, surpassing conventional phishing methods in their sophistication. These attacks possess the capability to maneuver around the security measures of multifactor authentication (MFA) by leveraging reverse-proxy functionality.
One prominent actor, identified as DEV-1101 and tracked by Microsoft, stands responsible for the development, facilitation, and promotion of various AiTM phishing kits. These kits are made available for purchase or rental, enabling other cybercriminals to perpetrate sophisticated phishing attacks. The accessibility of such kits in the criminal underground further industrializes the cybercrime economy, subsequently lowering the entry barrier for cybercriminal activities.
Detecting and mitigating the threats posed by AiTM phishing necessitates advanced monitoring techniques within 3rd-party networks. By delving into the artifacts obtained from 3rd-party network logs, we can unveil the footprints left by these sophisticated attacks. Understanding these artifacts is vital for proactive identification and response to AiTM phishing attempts, bolstering cybersecurity measures against this evolving threat landscape.
In our previous blog series, we delved into a large-scale phishing campaign. These sophisticated tactics involved the creation of fraudulent sites that intercepted user login credentials, allowing attackers to hijack sign-in sessions and bypass authentication protections. Even users with enabled Multifactor Authentication (MFA) fell victim to this method.
The related blogs covered the intricacies of this campaign, shedding light on the evolving landscape of cyber threats and the critical importance of safeguarding against AiTM phishing attacks.
Tools : Evilginx2, Modlishka, and Muraena.
Microsoft Sentinel, a cloud-native SIEM (Security Information and Event Management) solution, provides a powerful framework for detecting and responding to security threats. To detect AiTM phishing attack from the 3P (Third Party) vendors like PaloAlotoNetworks, Fortinet, Microsoft Sentinel has published several Out-Of-The-Box (OOTB) detections and hunting queries available via the Content Hub within the product, which are specifically designed to identify and respond to suspicious activities related to AiTM attacks. Below, we'll discuss three key rules and explain how they work:
The automatic attack disruption feature in Microsoft's XDR does not necessitate pre-configuration by the SOC team, it is inherently integrated. The following detections are enabled for automatic attack disruptions:
The following reference blogs describe how we can utilize 3rd-party network signals and integrate it with Microsoft 365 Defender detections :
Explore these sample SOAR playbook scenarios, illustrating how the mentioned alerts can seamlessly connect to automated measures for early-stage attack disruption. Utilize Microsoft Sentinel's SOAR service with these playbooks to effectively counter AiTM phishing attacks by implementing automated actions against users and IPs based on the described detection methods.
Microsoft Sentinel offers a wealth of pre-built playbooks designed to automate responses to triggered alerts, providing an automated disruption feature crucial for halting ongoing attacks and streamlining the remediation and sanitization of enterprise environments.
For instance, leveraging the above AiTM rules, we can take advantage of 3P disruption capabilities from Palo Alto PAN-OS, Fortinet FortiGate, Check Point and Zscaler solution. These 3P solutions empower automated blocking of malicious IPs and URLs the moment the corresponding analytical rule is triggered. To configure playbooks that respond to analytical rules identifying malicious IP and URL entries in the entity list, organizations can efficiently leverage the existing wealth of pre-built playbooks for disruption within Microsoft Sentinel.
Designing your personalized disruption strategies with Microsoft Sentinel Analytical Rules.
Unlock the potential of Microsoft Sentinel's dynamic playbooks in your organization's security arsenal. These playbooks aren't just tools; they're a launchpad for your creativity. Tailor them to your organization's unique needs, using them as a foundation that aligns seamlessly with your security requirements. Dive in to Respond to Threats by Using Playbooks with Automation Rules in Microsoft Sentinel documentation to craft playbooks that go beyond the standard, addressing the distinct needs of your environment. This customization grants you the ability to elevate threat response mechanisms and seamlessly integrate disruption capabilities that fortify your security posture.
Microsoft Sentinel's playbooks offer unparalleled flexibility, allowing you to not only build upon existing frameworks but also to curate a threat response strategy that perfectly syncs with the nuanced intricacies of your organization's evolving security landscape.
These Microsoft Sentinel rules expand visibility by including 3rd party network data sources. By analyzing a wide range of data sources and employing advanced correlation techniques, they provide insights that help you detect AiTM phishing events early. Here's how they can benefit your organization:
AiTM attacks are a growing concern in the cybersecurity landscape. Microsoft Sentinel's rules for AiTM attack detection provide valuable tools to safeguard your organization's data and infrastructure. Leveraging these rules and continually updating your security posture is crucial to staying one step ahead of evolving threats.
To fortify your organization's security against AiTM phishing Attack and evolving cyber threats, customizing analytical rules is imperative. This process extends your defense capabilities, especially in onboarding additional 3rd party vendors within the existing rule framework. Follow these steps to adapt and enhance the rules for a more comprehensive coverage:
By using this Best practices for Microsoft Sentinel | Microsoft Learn , About Microsoft Sentinel content and solutions | Microsoft Learn, you can effectively customize analytical rules to extend coverage, enhancing your organization's defense against AiTM phishing and emerging cyber threats. Continual adaptation and vigilance are essential to staying ahead in the ever-evolving landscape of cybersecurity.
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