AWS User Activity From Multiple Source IPs

Bryant Smith@flowstate

•updated Mar 12, 2026•3•0•52

Detects when the same AWS IAM user ARN performs actions from more than one distinct source IP within a 1-hour window. Indicative of session hijacking, credential sharing, or AiTM compromise where attacker egress IP differs from the victim's IP. AssumedRole is excluded by default due to high noise from automation — add back with tuned ARN exclusions if needed.