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MediumSigmaHQAdan Alvarez @adanalvarez

AWS STS GetCallerIdentity Enumeration Via TruffleHog

Detects the use of TruffleHog for AWS credential validation by identifying GetCallerIdentity API calls where the userAgent indicates TruffleHog. Threat actors leverage TruffleHog to enumerate and validate exposed AWS…

Description

Detects the use of TruffleHog for AWS credential validation by identifying GetCallerIdentity API calls where the userAgent indicates TruffleHog. Threat actors leverage TruffleHog to enumerate and validate exposed AWS keys. Successful exploitation allows threat actors to confirm the validity of compromised AWS credentials, facilitating further unauthorized access and actions within the AWS environment.

Detection logic

Detection requirements

Platform
IaaSIdentity ProviderOffice SuiteSaaS

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

  • Legitimate internal security scanning or key validation that intentionally uses TruffleHog. Authorize and filter known scanner roles, IP ranges, or assumed roles as needed.

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