{"id":"ad691d92-15f2-4181-9aa4-723c74f9ddc3","title":"Potential Defense Evasion Via Right-to-Left Override","description":"Detects the presence of the \"u202+E\" character, which causes a terminal, browser, or operating system to render text in a right-to-left sequence.\nThis character is used as an obfuscation and masquerading techniques by adversaries to trick users into opening malicious files.\n","author":"Micah Babinski, @micahbabinski, Swachchhanda Shrawan Poudel (Nextron Systems), Luc Génaux","status":"test","level":"high","date":"2023-02-15","modified":"2026-03-20","tags":["attack.stealth","attack.t1036.002"],"technique_ids":["T1036.002"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Commandlines that contains scriptures such as arabic or hebrew might make use of this character"],"references":["https://redcanary.com/blog/right-to-left-override/","https://www.malwarebytes.com/blog/news/2014/01/the-rtlo-method","https://unicode-explorer.com/c/202E","https://tria.ge/241015-l98snsyeje/behavioral2","https://unprotect.it/technique/right-to-left-override-rlo-extension-spoofing/"],"source_path":"rules/windows/process_creation/proc_creation_win_susp_right_to_left_override.yml","source_sha256":"7b2e055b10046f6199d2714fd1bb694826a23fd226397cee1a1095e50ee79b46","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_susp_right_to_left_override.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 Defense Evasion Via Right-to-Left Override\nid: ad691d92-15f2-4181-9aa4-723c74f9ddc3\nrelated:\n    - id: e0552b19-5a83-4222-b141-b36184bb8d79\n      type: derived\n    - id: 584bca0f-3608-4402-80fd-4075ff6072e3\n      type: derived\nstatus: test\ndescription: |\n    Detects the presence of the \"u202+E\" character, which causes a terminal, browser, or operating system to render text in a right-to-left sequence.\n    This character is used as an obfuscation and masquerading techniques by adversaries to trick users into opening malicious files.\nreferences:\n    - https://redcanary.com/blog/right-to-left-override/\n    - https://www.malwarebytes.com/blog/news/2014/01/the-rtlo-method\n    - https://unicode-explorer.com/c/202E\n    - https://tria.ge/241015-l98snsyeje/behavioral2\n    - https://unprotect.it/technique/right-to-left-override-rlo-extension-spoofing/\nauthor: Micah Babinski, @micahbabinski, Swachchhanda Shrawan Poudel (Nextron Systems), Luc Génaux\ndate: 2023-02-15\nmodified: 2026-03-20\ntags:\n    - attack.stealth\n    - attack.t1036.002\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        CommandLine|contains:\n            - '\\u202e'  # Unicode RTLO character\n            - '[U+202E]'\n            # Real char U+202E copied/pasted below\n            - '‮'\n    condition: selection\nfalsepositives:\n    - Commandlines that contains scriptures such as arabic or hebrew might make use of this character\nlevel: high\nregression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_susp_right_to_left_override/info.yml\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1036.002","id":"T1036.002","name":"Right-to-Left Override","page":"techniques/enterprise/T1036.002/"}],"data_path":"data/detection-rules/ad691d92-15f2-4181-9aa4-723c74f9ddc3.json","kind":"sigma"}