2026 Critical Enterprise Intrusion Chain Detection: Mass Browser Cookie and Session Database Staging for Exfiltration
This rule detects potential browser-based credential and session theft by monitoring for a process that accesses multiple sensitive web browser artifacts (cookies, local state, session storage) across several user profiles in a short timeframe. It correlates this activity with the subsequent creation of a compressed archive in a temporary directory followed by an outbound network connection, indicating a multi-stage exfiltration workflow.
Microsoft Sentinel (KQL)
