detection-rules
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Kubernetes Anonymous User Create/Update/Patch Pods Request

This rule detects attempts to create, update, or patch pods by an anonymous user. An anonymous user is a user that is not authenticated or authorized to access the Kubernetes API server. Creating, updating, or patching pods is a common activity for attackers to gain access to the cluster and execute commands.

Rule type: eql
Rule indices:

  • logs-kubernetes.audit_logs-*

Rule Severity: medium
Risk Score: 47
Runs every:
Searches indices from: ``
Maximum alerts per execution: 100
References:

Tags:

  • Data Source: Kubernetes
  • Domain: Kubernetes
  • Use Case: Threat Detection
  • Tactic: Execution
  • Resources: Investigation Guide

Version: 1
Rule authors:

  • Elastic

Rule license: Elastic License v2

any where event.dataset == "kubernetes.audit_logs" and (
    kubernetes.audit.user.username in ("system:anonymous", "system:unauthenticated") or
    kubernetes.audit.user.username == null or
    kubernetes.audit.user.username == ""
  ) and kubernetes.audit.level in ("RequestResponse", "ResponseComplete", "Request") and kubernetes.audit.verb in ("create", "update", "patch") and
kubernetes.audit.objectRef.resource == "pods"

Framework: MITRE ATT&CK