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MediumSigmaHQSean Johnstone | Unit 42

AWS S3 Bucket Versioning Disable

Detects when S3 bucket versioning is disabled. Threat actors use this technique during AWS ransomware incidents prior to deleting S3 objects.

Detection logic

Detection requirements

Platform
ContainersESXiIaaSLinuxmacOSNetwork DevicesWindows

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

Log source product
aws
Log source service
cloudtrail

Known benign triggers

  • AWS administrator legitimately disabling bucket versioning

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