{"id":"6c96fc76-0eb1-11eb-adc1-0242ac120002","title":"Invoke-Obfuscation STDIN+ Launcher","description":"Detects Obfuscated use of stdin to execute PowerShell","author":"Jonathan Cheong, oscd.community","status":"test","level":"high","date":"2020-10-15","modified":"2024-04-15","tags":["attack.stealth","attack.t1027","attack.execution","attack.t1059.001"],"technique_ids":["T1027","T1059.001"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://github.com/SigmaHQ/sigma/issues/1009"],"source_path":"rules/windows/process_creation/proc_creation_win_hktl_invoke_obfuscation_stdin.yml","source_sha256":"b906bbac20e5987144deae763c33e62d4f125ccf469b17714bca21c7f0e79025","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_hktl_invoke_obfuscation_stdin.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\nid: 6c96fc76-0eb1-11eb-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: 2024-04-15\ntags:\n    - attack.stealth\n    - attack.t1027\n    - attack.execution\n    - attack.t1059.001\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\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( $InpUt )\"\n        CommandLine|re: 'cmd.{0,5}(?:/c|/r).+powershell.+(?:\\$\\{?input\\}?|noexit).+\\\"'\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/6c96fc76-0eb1-11eb-adc1-0242ac120002.json","kind":"sigma"}