AWSCloudTrail - S3 bucket suspicious ransomware activity

Detects a ransomware-like sequence where objects are read from an S3 bucket and then overwritten using an external KMS key. This pattern can indicate malicious encryption and potential data denial in the bucket.

Detection logic

Detection requirements

Platform: ESXi IaaS Linux macOS Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: aws
Log source service: awscloudtrail

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Detection rules

AWSCloudTrail - S3 bucket suspicious ransomware activity

Detection logic

Detection requirements

MITRE ATT&CK mappings

From the source

Licence

Authorship

Detection rules