{"id":"72862bf2-0eb1-11eb-adc1-0242ac120002","title":"Invoke-Obfuscation STDIN+ Launcher - System","description":"Detects Obfuscated use of stdin to execute PowerShell","author":"Jonathan Cheong, oscd.community","status":"test","level":"high","date":"2020-10-15","modified":"2022-11-29","tags":["attack.stealth","attack.t1027","attack.execution","attack.t1059.001"],"technique_ids":["T1027","T1059.001"],"logsource":{"product":"windows","service":"system"},"falsepositives":["Unknown"],"references":["https://github.com/SigmaHQ/sigma/issues/1009"],"source_path":"rules/windows/builtin/system/service_control_manager/win_system_invoke_obfuscation_stdin_services.yml","source_sha256":"74af696d43068f068bbad3254d0306a3da0319fcc4ba92cc7ba8fb564dbed727","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/system/service_control_manager/win_system_invoke_obfuscation_stdin_services.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 STDIN+ Launcher - System\nid: 72862bf2-0eb1-11eb-adc1-0242ac120002\nstatus: test\ndescription: Detects Obfuscated use of stdin to execute PowerShell\nreferences:\n    - https://github.com/SigmaHQ/sigma/issues/1009  # (Task 25)\nauthor: Jonathan Cheong, oscd.community\ndate: 2020-10-15\nmodified: 2022-11-29\ntags:\n    - attack.stealth\n    - attack.t1027\n    - attack.execution\n    - attack.t1059.001\nlogsource:\n    product: windows\n    service: system\ndetection:\n    selection_main:\n        Provider_Name: 'Service Control Manager'\n        EventID: 7045\n        # ImagePath|re: 'cmd.{0,5}(?:\\/c|\\/r).+powershell.+(?:\\$\\{?input\\}?|noexit).+\\\"'\n        # Example 1: c:\\windows\\sYstEm32\\CmD.eXE /C\"echO\\Invoke-Expression (New-Object Net.WebClient).DownloadString | POwersHELl -NoEXiT -\"\n        # Example 2: c:\\WiNDOws\\sysTEm32\\cmd.EXe /C \" ECHo Invoke-Expression (New-Object Net.WebClient).DownloadString | POwersHELl -nol ${EXEcUtIONCONTeXT}.INvOkEComMANd.InvOKEScRIPt( $InpUt )\"\n        ImagePath|contains|all:\n            - 'cmd'\n            - 'powershell'\n        ImagePath|contains:\n            - '/c'\n            - '/r'\n    selection_other:\n        - ImagePath|contains: 'noexit'\n        - ImagePath|contains|all:\n              - 'input'\n              - '$'\n    condition: all of 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/72862bf2-0eb1-11eb-adc1-0242ac120002.json","kind":"sigma"}