{"id":"f5d19838-41b5-476c-98d8-ba8af4929ee2","title":"LOL-Binary Copied From System Directory","description":"Detects a suspicious copy operation that tries to copy a known LOLBIN from system (System32, SysWOW64, WinSxS) directories to another on disk in order to bypass detections based on locations.\n","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"high","date":"2023-08-29","modified":"2025-11-27","tags":["attack.stealth","attack.t1036.003"],"technique_ids":["T1036.003"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://www.hybrid-analysis.com/sample/8da5b75b6380a41eee3a399c43dfe0d99eeefaa1fd21027a07b1ecaa4cd96fdd?environmentId=120","https://web.archive.org/web/20180331144337/https://www.fireeye.com/blog/threat-research/2018/03/sanny-malware-delivery-method-updated-in-recently-observed-attacks.html","https://thedfirreport.com/2023/08/28/html-smuggling-leads-to-domain-wide-ransomware/","https://www.virustotal.com/gui/file/14e722855605ba78dc1d21153f0e1be90e7528149f2cd2d7d6eba8ef27534bdc/behavior"],"source_path":"rules/windows/process_creation/proc_creation_win_susp_copy_system_dir_lolbin.yml","source_sha256":"b62ad46588260c693b05fe4ae38386e3aeeb8f31406ae203db8576ef784b0624","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_susp_copy_system_dir_lolbin.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: LOL-Binary Copied From System Directory\nid: f5d19838-41b5-476c-98d8-ba8af4929ee2\nrelated:\n    - id: fff9d2b7-e11c-4a69-93d3-40ef66189767\n      type: derived\nstatus: test\ndescription: |\n    Detects a suspicious copy operation that tries to copy a known LOLBIN from system (System32, SysWOW64, WinSxS) directories to another on disk in order to bypass detections based on locations.\nreferences:\n    - https://www.hybrid-analysis.com/sample/8da5b75b6380a41eee3a399c43dfe0d99eeefaa1fd21027a07b1ecaa4cd96fdd?environmentId=120\n    - https://web.archive.org/web/20180331144337/https://www.fireeye.com/blog/threat-research/2018/03/sanny-malware-delivery-method-updated-in-recently-observed-attacks.html\n    - https://thedfirreport.com/2023/08/28/html-smuggling-leads-to-domain-wide-ransomware/\n    - https://www.virustotal.com/gui/file/14e722855605ba78dc1d21153f0e1be90e7528149f2cd2d7d6eba8ef27534bdc/behavior\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2023-08-29\nmodified: 2025-11-27\ntags:\n    - attack.stealth\n    - attack.t1036.003\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_tools_cmd:\n        Image|endswith: '\\cmd.exe'\n        CommandLine|contains: 'copy '\n    selection_tools_pwsh:\n        Image|endswith:\n            - '\\powershell.exe'\n            - '\\pwsh.exe'\n        CommandLine|contains:\n            - 'copy-item'\n            - ' copy '\n            - 'cpi '\n            - ' cp '\n    selection_tools_other:\n        - Image|endswith:\n              - '\\robocopy.exe'\n              - '\\xcopy.exe'\n        - OriginalFileName:\n              - 'robocopy.exe'\n              - 'XCOPY.EXE'\n    selection_target_path:\n        CommandLine|contains:\n            - '\\System32'\n            - '\\SysWOW64'\n            - '\\WinSxS'\n    selection_target_lolbin:\n        CommandLine|contains:\n            # Note: add more binaries to increase coverage\n            - '\\bitsadmin.exe'\n            - '\\calc.exe'\n            - '\\certutil.exe'\n            - '\\cmdl32.exe'\n            - '\\cscript.exe'\n            - '\\mshta.exe'\n            - '\\rundll32.exe'\n            - '\\wscript.exe'\n            - '\\ie4uinit.exe'\n    condition: 1 of selection_tools_* and all of selection_target_*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1036.003","id":"T1036.003","name":"Rename Legitimate Utilities","page":"techniques/enterprise/T1036.003/"}],"data_path":"data/detection-rules/f5d19838-41b5-476c-98d8-ba8af4929ee2.json","kind":"sigma"}