Query: write Sigma for Identifies when ClusterRoles/Roles are being modified or deleted.
Matching passage: Sigma rule: Identifies when ClusterRoles/Roles are being modified or deleted.. Logsource: azure / activitylogs. Rule: title: Azure Kubernetes Sensitive Role Access id: 818fee0c-e0ec-4e45-824e-83e4817b0887 status: test description: Identifies when ClusterRoles/Roles are being modified or deleted. 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 author: Austin Songer @austinsonger date: 2021-08-07 modified: 2022-08-23 tags: - attack.impact - attack.t1485 - attack.t1496 - attack.t1489 logsource: product: azure service: activitylogs detection: selection: operationName: - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/ROLES/WRITE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/ROLES/DELETE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/ROLES/BIND/ACTION - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/ROLES/ESCALATE/ACTION - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/CLUSTERROLES/WRITE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/CLUSTERROLES/DELETE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/CLUSTERROLES/BIND/ACTION - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/RBAC.AUTHORIZATION.K8S.IO/CLUSTERROLES/ESCALATE/ACTION condition: selection falsepositives: - ClusterRoles/Roles 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. - ClusterRoles/Roles modification from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule. level: medium
Near-miss passage: Sigma rule: Detects the addition of a new rule to the Windows Firewall exception list for an application located in a potentially su. Logsource: windows / firewall-as. Rule: title: New Firewall Rule Added In Windows Firewall Exception List For Potential Suspicious Application id: 9e2575e7-2cb9-4da1-adc8-ed94221dca5e related: - id: cde0a575-7d3d-4a49-9817-b8004a7bf105 type: derived status: test description: Detects the addition of a new rule to the Windows Firewall exception list for an application located in a potentially suspicious location. references: - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-r2-and-2008/dd364427(v=ws.10) - https://app.any.run/tasks/7123e948-c91e-49e0-a813-00e8d72ab393/# author: frack113 date: 2023-02-26 modified: 2024-05-10 tags: - attack.defense-impairment - attack.t1686.003 logsource: product: windows service: firewall-as detection: selection: EventID: - 2004 - 2071 - 2097 ApplicationPath|contains: - :\PerfLogs\ - :\Temp\ - :\Tmp\ - :\Users\Public\ - :\Windows\Tasks\ - :\Windows\Temp\ - \AppData\Local\Temp\ filter_main_block: Action: 2 condition: selection and not 1 of filter_main_* falsepositives: - Unknown level: high