Sentinel UEBA Behaviors: Detecting Insider Threats and Anomalous User Activity

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In this article, we delve into the UEBA Behaviors layer in Microsoft Sentinel – a powerful tool for SOC analysts and threat hunters. We’ll cover how to enable UEBA, connect identity data sources, interpret insights, create analytics rules, and tune settings to minimize false positives.

To start, navigate to the Sentinel settings, locate the UEBA Behaviors section, and toggle it on. Next, add Azure AD and on-premises Active Directory (AD) data sources for a comprehensive view of user activity.

Once enabled, review entity behavior timelines to identify suspicious patterns. The UEBA analytics engine evaluates user behavior against historical norms and flags anomalies.

Based on these insights, you can create custom analytics rules. These rules are triggered when the entity risk score exceeds a specified threshold, helping you focus on high-priority investigations.

To reduce false positives, adjust the rule’s sensitivity settings. Lower values increase the likelihood of flagging genuine threats while potentially suppressing less critical activity.

By mastering UEBA Behaviors in Microsoft Sentinel, you can effectively detect and respond to insider threats and anomalous user activities.

Key Takeaway: Apply the steps and concepts in this post to strengthen your Microsoft IT environment. Ready to go deeper? Explore our hands-on training below.

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Written by Mohammed Akhter

Founder of ITP Training. 50,000+ students trained across 30+ countries in Microsoft endpoint and cloud security. Learn more →