AiTM - Anomalous Sign-in via Proxy IP
This rule detects successful user sign-ins from anomalous IP addresses, indicative of an Adversary-in-the-Middle (AiTM) reverse proxy attack. It correlates successful logins with the receipt of a phishing email containing specific subject keywords ('Code of Conduct') within a two-hour window, suggesting that the login was a direct result of the phishing lure.
Microsoft Sentinel (KQL)
