Google Cloud unauthorized user activity
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Goal
Detect when unauthorized activity by a user is detected in Google Cloud.
Strategy
Monitor Google Cloud logs and detect when a user account makes an API request and the request returns the status code equal to 7 within the log attribute @data.protoPayload.status.code. The status code 7 indicates the user account did not have permission to make the API call.
Triage and response
- Investigate the user:
{{@usr.id}} that made the unauthorized calls and confirm if there is a misconfiguration in IAM permissions or if an attacker compromised the user account. - If unauthorized, revoke access of compromised user account and rotate credentials.
Changelog
22 June 2022 - Updated query, rule case and triage.
