Kubernetes Suspicious Self-Subject Reviewedit

This rule detects when a service account or node attempts to enumerate their own permissions via the selfsubjectaccessreview or selfsubjectrulesreview APIs. This is highly unusual behavior for non-human identities like service accounts and nodes. An adversary may have gained access to credentials/tokens and this could be an attempt to determine what privileges they have to facilitate further movement or execution within the cluster.

Rule type: query

Rule indices:

  • logs-kubernetes.*

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-6m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100



  • Elastic
  • Kubernetes
  • Continuous Monitoring
  • Discovery Added (Elastic Stack release): 8.4.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positivesedit

An administrator may submit this request as an "impersonatedUser" to determine what privileges a particular service account has been granted. However, an adversary may utilize the same technique as a means to determine the privileges of another token other than that of the compromised account.

Investigation guideedit

Rule queryedit

kubernetes.audit.verb:"create" and
kubernetes.audit.objectRef.resource:("selfsubjectaccessreviews" or
"selfsubjectrulesreviews") and
kubernetes.audit.user.username:(system\:serviceaccount\:* or
system\:node\:*) or
or system\:node\:*)

Threat mappingedit