{"id":"83c17918-746e-4bd9-920b-8e098bf88c23","title":"Azure Network Firewall Policy Modified or Deleted","description":"Identifies when a Firewall Policy is Modified or Deleted.","author":"Austin Songer @austinsonger","status":"test","level":"medium","date":"2021-09-02","modified":"2022-08-23","tags":["attack.impact","attack.defense-impairment","attack.t1686.001"],"technique_ids":["T1686.001"],"logsource":{"product":"azure","service":"activitylogs"},"falsepositives":["Firewall Policy 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.","Firewall Policy 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"],"source_path":"rules/cloud/azure/activity_logs/azure_network_firewall_policy_modified_or_deleted.yml","source_sha256":"6572321700dfe2ffe01e0a466d3a9352a910c19433b6c13ae3c2b829821d8950","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/azure/activity_logs/azure_network_firewall_policy_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 Network Firewall Policy Modified or Deleted\nid: 83c17918-746e-4bd9-920b-8e098bf88c23\nstatus: test\ndescription: Identifies when a Firewall Policy is Modified or Deleted.\nreferences:\n    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations\nauthor: Austin Songer @austinsonger\ndate: 2021-09-02\nmodified: 2022-08-23\ntags:\n    - attack.impact\n    - attack.defense-impairment\n    - attack.t1686.001\nlogsource:\n    product: azure\n    service: activitylogs\ndetection:\n    selection:\n        operationName:\n            - MICROSOFT.NETWORK/FIREWALLPOLICIES/WRITE\n            - MICROSOFT.NETWORK/FIREWALLPOLICIES/JOIN/ACTION\n            - MICROSOFT.NETWORK/FIREWALLPOLICIES/CERTIFICATES/ACTION\n            - MICROSOFT.NETWORK/FIREWALLPOLICIES/DELETE\n    condition: selection\nfalsepositives:\n    - Firewall Policy 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    - Firewall Policy 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/T1686.001","id":"T1686.001","name":"Cloud Firewall","page":"techniques/enterprise/T1686.001/"}],"data_path":"data/detection-rules/83c17918-746e-4bd9-920b-8e098bf88c23.json","kind":"sigma"}