{"id":"12d027c3-b48c-4d9d-8bb6-a732200034b2","title":"Azure Kubernetes Service Account Modified or Deleted","description":"Identifies when a service account is modified or deleted.","author":"Austin Songer @austinsonger","status":"test","level":"medium","date":"2021-08-07","modified":"2022-08-23","tags":["attack.impact","attack.t1531","attack.t1485","attack.t1496","attack.t1489"],"technique_ids":["T1485","T1489","T1496","T1531"],"logsource":{"product":"azure","service":"activitylogs"},"falsepositives":["Service account being modified or 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.","Service account modified or deleted 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_service_account_modified_or_deleted.yml","source_sha256":"c50841d257a02288c496f679e2f35b7c9d58f6661214d3795c704680f341eba4","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/azure/activity_logs/azure_kubernetes_service_account_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 Service Account Modified or Deleted\nid: 12d027c3-b48c-4d9d-8bb6-a732200034b2\nstatus: test\ndescription: Identifies when a service account is modified or deleted.\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.t1531\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/SERVICEACCOUNTS/WRITE\n            - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/SERVICEACCOUNTS/DELETE\n            - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/SERVICEACCOUNTS/IMPERSONATE/ACTION\n    condition: selection\nfalsepositives:\n    - Service account being modified or 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    - Service account modified or deleted 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/"},{"key":"enterprise/T1531","id":"T1531","name":"Account Access Removal","page":"techniques/enterprise/T1531/"}],"data_path":"data/detection-rules/12d027c3-b48c-4d9d-8bb6-a732200034b2.json","kind":"sigma"}