{"id":"f0cdd048-82dc-4f7a-8a7a-b87a52b6d0fd","title":"Potential Commandline Obfuscation Using Escape Characters","description":"Detects potential commandline obfuscation using known escape characters","author":"juju4","status":"test","level":"medium","date":"2018-12-11","modified":"2023-03-03","tags":["attack.stealth","attack.t1140"],"technique_ids":["T1140"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://twitter.com/vysecurity/status/885545634958385153","https://twitter.com/Hexacorn/status/885553465417756673","https://twitter.com/Hexacorn/status/885570278637678592","https://www.mandiant.com/resources/blog/obfuscation-wild-targeted-attackers-lead-way-evasion-techniques","https://web.archive.org/web/20190213114956/http://www.windowsinspired.com/understanding-the-command-line-string-and-arguments-received-by-a-windows-program/"],"source_path":"rules/windows/process_creation/proc_creation_win_susp_cli_obfuscation_escape_char.yml","source_sha256":"8347931609c5bd886bc050b2a2ed61b73515d62591f42f2d1a2b8327deb94b07","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_susp_cli_obfuscation_escape_char.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potential Commandline Obfuscation Using Escape Characters\nid: f0cdd048-82dc-4f7a-8a7a-b87a52b6d0fd\nstatus: test\ndescription: Detects potential commandline obfuscation using known escape characters\nreferences:\n    - https://twitter.com/vysecurity/status/885545634958385153\n    - https://twitter.com/Hexacorn/status/885553465417756673 # Dead link\n    - https://twitter.com/Hexacorn/status/885570278637678592 # Dead link\n    - https://www.mandiant.com/resources/blog/obfuscation-wild-targeted-attackers-lead-way-evasion-techniques\n    - https://web.archive.org/web/20190213114956/http://www.windowsinspired.com/understanding-the-command-line-string-and-arguments-received-by-a-windows-program/\nauthor: juju4\ndate: 2018-12-11\nmodified: 2023-03-03\ntags:\n    - attack.stealth\n    - attack.t1140\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        CommandLine|contains:\n            # - <TAB>   # no TAB modifier in sigmac yet, so this matches <TAB> (or TAB in elasticsearch backends without DSL queries)\n            - 'h^t^t^p'\n            - 'h\"t\"t\"p'\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1140","id":"T1140","name":"Deobfuscate/Decode Files or Information","page":"techniques/enterprise/T1140/"}],"data_path":"data/detection-rules/f0cdd048-82dc-4f7a-8a7a-b87a52b6d0fd.json","kind":"sigma"}