GCP Kubernetes Rolebindings Created or Patched

Identifies the creation or patching of potential malicious rolebinding. You can assign these roles to Kubernetes subjects (users, groups, or service accounts) with role bindings and cluster role bindings.

Rule type: query

Rule indices:

filebeat-*
logs-gcp*

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-20m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Elastic
Cloud
GCP
Continuous Monitoring
SecOps
Configuration Audit

Version: 1

Added (Elastic Stack release): 7.16.0

Rule authors: Elastic, Austin Songer

Rule license: Elastic License v2

Investigation guide

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## Config

The GCP Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

Rule query

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event.dataset:(googlecloud.audit or gcp.audit) and
event.action:(io.k8s.authorization.rbac.v*.clusterrolebindings.create
or io.k8s.authorization.rbac.v*.rolebindings.create or
io.k8s.authorization.rbac.v*.clusterrolebindings.patch or
io.k8s.authorization.rbac.v*.rolebindings.patch) and
event.outcome:success

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/

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