{"id":"25cb259b-bbdc-4b87-98b7-90d7c72f8743","title":"Azure Kubernetes RoleBinding/ClusterRoleBinding Modified and Deleted","description":"Detects the creation or patching of potential malicious RoleBinding/ClusterRoleBinding.","author":"Austin Songer @austinsonger","status":"test","level":"medium","date":"2021-08-07","modified":"2022-08-23","tags":["attack.impact","attack.credential-access","attack.t1485","attack.t1496","attack.t1489"],"technique_ids":["T1485","T1489","T1496"],"logsource":{"product":"azure","service":"activitylogs"},"falsepositives":["RoleBinding/ClusterRoleBinding being modified and deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.","RoleBinding/ClusterRoleBinding modification from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule."],"references":["https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftkubernetes","https://www.microsoft.com/security/blog/2021/03/23/secure-containerized-environments-with-updated-threat-matrix-for-kubernetes/","https://www.microsoft.com/security/blog/2020/04/02/attack-matrix-kubernetes/","https://medium.com/mitre-engenuity/att-ck-for-containers-now-available-4c2359654bf1"],"source_path":"rules/cloud/azure/activity_logs/azure_kubernetes_rolebinding_modified_or_deleted.yml","source_sha256":"31a9d404a54dde367db6165a1473bf76b7054c597d505ec6576c056cec889bf5","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/azure/activity_logs/azure_kubernetes_rolebinding_modified_or_deleted.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Azure Kubernetes RoleBinding/ClusterRoleBinding Modified and Deleted\nid: 25cb259b-bbdc-4b87-98b7-90d7c72f8743\nstatus: test\ndescription: Detects the creation or patching of potential malicious RoleBinding/ClusterRoleBinding.\nreferences:\n    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftkubernetes\n    - https://www.microsoft.com/security/blog/2021/03/23/secure-containerized-environments-with-updated-threat-matrix-for-kubernetes/\n    - https://www.microsoft.com/security/blog/2020/04/02/attack-matrix-kubernetes/\n    - https://medium.com/mitre-engenuity/att-ck-for-containers-now-available-4c2359654bf1\nauthor: Austin Songer @austinsonger\ndate: 2021-08-07\nmodified: 2022-08-23\ntags:\n    - attack.impact\n    - attack.credential-access\n    - attack.t1485\n    - attack.t1496\n    - attack.t1489\nlogsource:\n    product: azure\n    service: activitylogs\ndetection:\n    selection:\n        operationName:\n            - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/CLUSTERROLEBINDINGS/WRITE\n            - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/CLUSTERROLEBINDINGS/DELETE\n            - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/ROLEBINDINGS/WRITE\n            - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/ROLEBINDINGS/DELETE\n    condition: selection\nfalsepositives:\n    - RoleBinding/ClusterRoleBinding being modified and deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.\n    - RoleBinding/ClusterRoleBinding modification from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1485","id":"T1485","name":"Data Destruction","page":"techniques/enterprise/T1485/"},{"key":"enterprise/T1489","id":"T1489","name":"Service Stop","page":"techniques/enterprise/T1489/"},{"key":"enterprise/T1496","id":"T1496","name":"Resource Hijacking","page":"techniques/enterprise/T1496/"}],"data_path":"data/detection-rules/25cb259b-bbdc-4b87-98b7-90d7c72f8743.json","kind":"sigma"}