Access denied for Google Cloud Service Account

gcp

Classification:

attack

Tactic:

TA0004-privilege-escalation

Technique:

T1078-valid-accounts

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Goal

Detect when a Google Cloud service account (@usr.id:*.iam.gserviceaccount.com) exhibits access denied behavior that deviates from normal.

Strategy

Inspect the Google Cloud service account (@usr.id:*.iam.gserviceaccount.com) for errors (@data.protoPayload.status.code:7) caused by denied permissions (@evt.outcome). The anomaly detection will baseline each service account and then generate a security signal when a service account deviates from their baseline.

Triage and response

Investigate the logs and determine whether or not the Google Cloud service account {{@usr.id}} is compromised.