{"id":"a5a30a6e-75ca-4233-8b8c-42e0f2037d3b","title":"Invoke-Obfuscation Via Use Rundll32 - PowerShell","description":"Detects Obfuscated Powershell via use Rundll32 in Scripts","author":"Nikita Nazarov, oscd.community","status":"test","level":"high","date":"2019-10-08","modified":"2022-11-29","tags":["attack.stealth","attack.t1027","attack.execution","attack.t1059.001"],"technique_ids":["T1027","T1059.001"],"logsource":{"product":"windows","category":"ps_script","definition":"Requirements: Script Block Logging must be enabled"},"falsepositives":["Unknown"],"references":["https://github.com/SigmaHQ/sigma/issues/1009"],"source_path":"rules/windows/powershell/powershell_script/posh_ps_invoke_obfuscation_via_use_rundll32.yml","source_sha256":"d2c41a962d67604788543cf044989d1130beaeb62db892f55cda0ed0f700acc9","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/powershell/powershell_script/posh_ps_invoke_obfuscation_via_use_rundll32.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 - PowerShell\nid: a5a30a6e-75ca-4233-8b8c-42e0f2037d3b\nstatus: test\ndescription: Detects Obfuscated Powershell via use Rundll32 in Scripts\nreferences:\n    - https://github.com/SigmaHQ/sigma/issues/1009\nauthor: Nikita Nazarov, oscd.community\ndate: 2019-10-08\nmodified: 2022-11-29\ntags:\n    - attack.stealth\n    - attack.t1027\n    - attack.execution\n    - attack.t1059.001\nlogsource:\n    product: windows\n    category: ps_script\n    definition: 'Requirements: Script Block Logging must be enabled'\ndetection:\n    selection_4104:\n        ScriptBlockText|contains|all:\n            - '&&'\n            - 'rundll32'\n            - 'shell32.dll'\n            - 'shellexec_rundll'\n        ScriptBlockText|contains:\n            - 'value'\n            - 'invoke'\n            - 'comspec'\n            - 'iex'\n    condition: selection_4104\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/a5a30a6e-75ca-4233-8b8c-42e0f2037d3b.json","kind":"sigma"}