{"id":"3ef5605c-9eb9-47b0-9a71-b727e6aa5c3b","title":"Use NTFS Short Name in Image","description":"Detect use of the Windows 8.3 short name. Which could be used as a method to avoid Image based detection","author":"frack113, Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"medium","date":"2022-08-06","modified":"2023-07-20","tags":["attack.stealth","attack.t1564.004"],"technique_ids":["T1564.004"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Software Installers"],"references":["https://www.acunetix.com/blog/articles/windows-short-8-3-filenames-web-security-problem/","https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-2000-server/cc959352(v=technet.10)","https://twitter.com/jonasLyk/status/1555914501802921984"],"source_path":"rules/windows/process_creation/proc_creation_win_susp_ntfs_short_name_use_image.yml","source_sha256":"ee12e257f3a75405514d4f519dcd9a4185c8ab4eaaddc5b15a32c6860fdd3240","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_susp_ntfs_short_name_use_image.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Use NTFS Short Name in Image\nid: 3ef5605c-9eb9-47b0-9a71-b727e6aa5c3b\nrelated:\n    - id: dd6b39d9-d9be-4a3b-8fe0-fe3c6a5c1795\n      type: similar\nstatus: test\ndescription: Detect use of the Windows 8.3 short name. Which could be used as a method to avoid Image based detection\nreferences:\n    - https://www.acunetix.com/blog/articles/windows-short-8-3-filenames-web-security-problem/\n    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-2000-server/cc959352(v=technet.10)\n    - https://twitter.com/jonasLyk/status/1555914501802921984\nauthor: frack113, Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-08-06\nmodified: 2023-07-20\ntags:\n    - attack.stealth\n    - attack.t1564.004\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection:\n        Image|contains:\n            - '~1.bat'\n            - '~1.dll'\n            - '~1.exe'\n            - '~1.hta'\n            - '~1.js'\n            - '~1.msi'\n            - '~1.ps1'\n            - '~1.tmp'\n            - '~1.vbe'\n            - '~1.vbs'\n            - '~2.bat'\n            - '~2.dll'\n            - '~2.exe'\n            - '~2.hta'\n            - '~2.js'\n            - '~2.msi'\n            - '~2.ps1'\n            - '~2.tmp'\n            - '~2.vbe'\n            - '~2.vbs'\n    filter_main_generic_parent:\n        ParentImage: 'C:\\Windows\\explorer.exe'\n    filter_optional_webex:\n        ParentImage|endswith: '\\WebEx\\WebexHost.exe'\n    filter_optional_thor:\n        ParentImage|endswith: '\\thor\\thor64.exe'\n    filter_optional_winzip:\n        Image: 'C:\\PROGRA~1\\WinZip\\WZPREL~1.EXE'\n    filter_optional_vcred:\n        Image|endswith: '\\VCREDI~1.EXE'\n    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*\nfalsepositives:\n    - Software Installers\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1564.004","id":"T1564.004","name":"NTFS File Attributes","page":"techniques/enterprise/T1564.004/"}],"data_path":"data/detection-rules/3ef5605c-9eb9-47b0-9a71-b727e6aa5c3b.json","kind":"sigma"}