detection focused on suspicious session replay and AiTM-related behavior
Detects possible Adversary-in-the-Middle (AiTM) attacks, session cookie replay, MFA session hijacking, token theft, and stolen cloud session reuse by identifying abnormal SessionId reuse across multiple IPs, browsers, and devices. This detection compares current session activity against a 14-day historical user behavior baseline to identify new or abnormal behavior. It includes risk scoring and account classification, while reducing false positives from token refresh activity and common Microsoft Teams noise.
Microsoft Sentinel (KQL)
