{"id":"cd0f7229-d16f-42de-8fe3-fba365fbcb3a","title":"Invoke-Obfuscation Via Use Rundll32 - Security","description":"Detects Obfuscated Powershell via use Rundll32 in Scripts","author":"Nikita Nazarov, oscd.community","status":"test","level":"high","date":"2020-10-09","modified":"2022-11-29","tags":["attack.stealth","attack.t1027","attack.execution","attack.t1059.001"],"technique_ids":["T1027","T1059.001"],"logsource":{"product":"windows","service":"security","definition":"The 'System Security Extension' audit subcategory need to be enabled to log the EID 4697"},"falsepositives":["Unknown"],"references":["https://github.com/SigmaHQ/sigma/issues/1009"],"source_path":"rules/windows/builtin/security/win_security_invoke_obfuscation_via_use_rundll32_services_security.yml","source_sha256":"a32966c68587e1111fb33528ee7556a6f05f355435cbeef502a46c69b0b749fc","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/security/win_security_invoke_obfuscation_via_use_rundll32_services_security.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Invoke-Obfuscation Via Use Rundll32 - Security\nid: cd0f7229-d16f-42de-8fe3-fba365fbcb3a\nrelated:\n    - id: 641a4bfb-c017-44f7-800c-2aee0184ce9b\n      type: derived\nstatus: test\ndescription: Detects Obfuscated Powershell via use Rundll32 in Scripts\nreferences:\n    - https://github.com/SigmaHQ/sigma/issues/1009 # (Task30)\nauthor: Nikita Nazarov, oscd.community\ndate: 2020-10-09\nmodified: 2022-11-29\ntags:\n    - attack.stealth\n    - attack.t1027\n    - attack.execution\n    - attack.t1059.001\nlogsource:\n    product: windows\n    service: security\n    definition: The 'System Security Extension' audit subcategory need to be enabled to log the EID 4697\ndetection:\n    selection:\n        EventID: 4697\n        ServiceFileName|contains|all:\n            - '&&'\n            - 'rundll32'\n            - 'shell32.dll'\n            - 'shellexec_rundll'\n        ServiceFileName|contains:\n            - value\n            - invoke\n            - comspec\n            - iex\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1027","id":"T1027","name":"Obfuscated Files or Information","page":"techniques/enterprise/T1027/"},{"key":"enterprise/T1059.001","id":"T1059.001","name":"PowerShell","page":"techniques/enterprise/T1059.001/"}],"data_path":"data/detection-rules/cd0f7229-d16f-42de-8fe3-fba365fbcb3a.json","kind":"sigma"}