IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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GCP Kubernetes Rolebindings Created or Patched

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GCP Kubernetes Rolebindings Created or Patched

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Identifies the creation or patching of potentially malicious role bindings. Users can use role bindings and cluster role bindings to assign roles to Kubernetes subjects (users, groups, or service accounts).

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: 100 (version history)

Added (Elastic Stack release): 7.16.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic, Austin Songer

Rule license: Elastic License v2

Investigation guide

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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 and not
gcp.audit.authentication_info.principal_email:"system:addon-manager"

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/

Rule version history

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Version 100 (8.5.0 release)

Formatting only

Version 4 (8.4.0 release)

Updated query, changed from:

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 and not
gcp.audit.authentication_info.principal_email:"system:addon-manager"

Version 2 (8.1.0 release)

Updated query, changed from:

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

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