Kubernetes GCP detect RBAC authorizations by account

Name:Kubernetes GCP detect RBAC authorizations by account
id:99487de3-7192-4b41-939d-fbe9acfb1340
version:3
date:2024-10-17
author:Rod Soto, Splunk
status:deprecated
type:Hunting
Description:This search provides information on Kubernetes RBAC authorizations by accounts, this search can be modified by adding top to see both extremes of RBAC by accounts occurrences
Data_source:

search:`google_gcp_pubsub_message` data.labels.authorization.k8s.io/reason=ClusterRoleBinding OR Clusterrole
| table src_ip src_user data.labels.authorization.k8s.io/decision data.labels.authorization.k8s.io/reason
| rare src_user data.labels.authorization.k8s.io/reason |`kubernetes_gcp_detect_rbac_authorizations_by_account_filter`

how_to_implement:You must install splunk AWS add on for GCP. This search works with pubsub messaging service logs
known_false_positives:Not all RBAC Authorications are malicious. RBAC authorizations can uncover malicious activity specially if sensitive Roles have been granted.
References:
drilldown_searches:
  :
tags:
  analytic_story:
    - 'Kubernetes Sensitive Role Activity'
  asset_type:GCP GKE Kubernetes cluster
  confidence:50
  impact:50
  message:tbd
  observable:
    name:'src_user'
    type:'User'
    - role:
      - 'Victim'
  product:
    - 'Splunk Enterprise'
    - 'Splunk Enterprise Security'
    - 'Splunk Cloud'
  required_fields:
    - '_time'
  risk_score:25
  security_domain:threat

tests:
  :
manual_test:None