{"id":"0adfbc14-0ed1-11eb-adc1-0242ac120002","title":"Invoke-Obfuscation VAR+ Launcher - PowerShell","description":"Detects Obfuscated use of Environment Variables to execute PowerShell","author":"Jonathan Cheong, oscd.community","status":"test","level":"high","date":"2020-10-15","modified":"2024-04-05","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_var.yml","source_sha256":"c337dddf74c2b5a3ac7d71310b89b4a1d44e0a0dc37577dde15cd1e114c4d2bc","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/powershell/powershell_script/posh_ps_invoke_obfuscation_var.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 VAR+ Launcher - PowerShell\nid: 0adfbc14-0ed1-11eb-adc1-0242ac120002\nstatus: test\ndescription: Detects Obfuscated use of Environment Variables to execute PowerShell\nreferences:\n    - https://github.com/SigmaHQ/sigma/issues/1009  # (Task 24)\nauthor: Jonathan Cheong, oscd.community\ndate: 2020-10-15\nmodified: 2024-04-05\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|re: 'cmd.{0,5}(?:/c|/r)(?:\\s|)\"set\\s[a-zA-Z]{3,6}.*(?:\\{\\d\\}){1,}\\\\\"\\s+?-f(?:.*\\)){1,}.*\"'\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/0adfbc14-0ed1-11eb-adc1-0242ac120002.json","kind":"sigma"}