{"id":"4931188c-178e-4ee7-a348-39e8a7a56821","title":"Filter Driver Unloaded Via Fltmc.EXE","description":"Detect filter driver unloading activity via fltmc.exe","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"medium","date":"2023-02-13","modified":"2025-10-07","tags":["attack.stealth","attack.defense-impairment","attack.t1070","attack.t1685","attack.t1685.001"],"technique_ids":["T1070","T1685","T1685.001"],"logsource":{"product":"windows","category":"process_creation"},"falsepositives":["Unknown"],"references":["https://www.darkoperator.com/blog/2018/10/5/operating-offensively-against-sysmon","https://www.cybereason.com/blog/threat-analysis-report-lockbit-2.0-all-paths-lead-to-ransom"],"source_path":"rules/windows/process_creation/proc_creation_win_fltmc_unload_driver.yml","source_sha256":"87b3264ec0cbeeb8234429aad143d49bdefe62f29bef41bce4d87d0f35072e3f","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_fltmc_unload_driver.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Filter Driver Unloaded Via Fltmc.EXE\nid: 4931188c-178e-4ee7-a348-39e8a7a56821\nrelated:\n    - id: 4d7cda18-1b12-4e52-b45c-d28653210df8 # Sysmon specific\n      type: derived\nstatus: test\ndescription: Detect filter driver unloading activity via fltmc.exe\nreferences:\n    - https://www.darkoperator.com/blog/2018/10/5/operating-offensively-against-sysmon\n    - https://www.cybereason.com/blog/threat-analysis-report-lockbit-2.0-all-paths-lead-to-ransom\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2023-02-13\nmodified: 2025-10-07\ntags:\n    - attack.stealth\n    - attack.defense-impairment\n    - attack.t1070\n    - attack.t1685\n    - attack.t1685.001\nlogsource:\n    product: windows\n    category: process_creation\ndetection:\n    selection_img:\n        - Image|endswith: '\\fltMC.exe'\n        - OriginalFileName: 'fltMC.exe'\n    selection_cli:\n        CommandLine|contains: 'unload'\n    filter_optional_avira:\n        ParentImage|contains:\n            - '\\AppData\\Local\\Temp\\'\n            - ':\\Windows\\Temp\\'\n        ParentImage|endswith: '\\endpoint-protection-installer-x64.tmp'\n        CommandLine|endswith:\n            - 'unload rtp_filesystem_filter'\n            - 'unload rtp_filter'\n    filter_optional_manageengine:\n        ParentImage: 'C:\\Program Files (x86)\\ManageEngine\\uems_agent\\bin\\dcfaservice64.exe'\n        CommandLine|endswith: 'unload DFMFilter'\n    condition: all of selection_* and not 1 of filter_optional_*\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1070","id":"T1070","name":"Indicator Removal","page":"techniques/enterprise/T1070/"},{"key":"enterprise/T1685","id":"T1685","name":"Disable or Modify Tools","page":"techniques/enterprise/T1685/"},{"key":"enterprise/T1685.001","id":"T1685.001","name":"Disable or Modify Windows Event Log","page":"techniques/enterprise/T1685.001/"}],"data_path":"data/detection-rules/4931188c-178e-4ee7-a348-39e8a7a56821.json","kind":"sigma"}