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MediumSigmaHQTom Kluter

Google Workspace Out Of Domain Email Forwarding

Detects automatic email forwarding to external domains in Google Workspace, which may indicate data leakage or misuse.

Detection logic

Detection requirements

Platform
LinuxmacOSOffice SuiteWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source product
gcp
Log source service
google_workspace_login

Known benign triggers

  • Legitimate forwarding

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