{"id":"d7b81144-b866-48a4-9bcc-275dc69d870e","title":"Windows EventLog Autologger Session Registry Modification Via CommandLine","description":"Detects attempts to disable Windows EventLog autologger sessions via registry modification.\nThe AutoLogger event tracing session records events that occur early in the operating system boot process.\nApplications and device drivers can use the AutoLogger session to capture traces before the user logs in.\nAdversaries may disable these sessions to evade detection and prevent security monitoring of early boot activities and system events.\n","author":"Swachchhanda Shrawan Poudel (Nextron Systems)","status":"experimental","level":"high","date":"2025-12-25","modified":"","tags":["attack.defense-impairment","attack.t1685.001"],"technique_ids":["T1685.001"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Unknown"],"references":["https://learn.microsoft.com/en-us/windows/win32/etw/configuring-and-starting-an-autologger-session","https://ptylu.github.io/content/report/report.html?report=25","https://blog.palantir.com/tampering-with-windows-event-tracing-background-offense-and-defense-4be7ac62ac63"],"source_path":"rules/windows/process_creation/proc_creation_win_autologger_session_registry_modification.yml","source_sha256":"0f075b5d36ed61f629634a2f0bced81a9416cf35cba517320b18eeccd82df35c","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_autologger_session_registry_modification.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Windows EventLog Autologger Session Registry Modification Via CommandLine\nid: d7b81144-b866-48a4-9bcc-275dc69d870e\nrelated:\n    - id: f37b4bce-49d0-4087-9f5b-58bffda77316\n      type: similar\nstatus: experimental\ndescription: |\n    Detects attempts to disable Windows EventLog autologger sessions via registry modification.\n    The AutoLogger event tracing session records events that occur early in the operating system boot process.\n    Applications and device drivers can use the AutoLogger session to capture traces before the user logs in.\n    Adversaries may disable these sessions to evade detection and prevent security monitoring of early boot activities and system events.\nreferences:\n    - https://learn.microsoft.com/en-us/windows/win32/etw/configuring-and-starting-an-autologger-session\n    - https://ptylu.github.io/content/report/report.html?report=25\n    - https://blog.palantir.com/tampering-with-windows-event-tracing-background-offense-and-defense-4be7ac62ac63\nauthor: Swachchhanda Shrawan Poudel (Nextron Systems)\ndate: 2025-12-25\ntags:\n    - attack.defense-impairment\n    - attack.t1685.001\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_img:\n        - Image|endswith:\n              - '\\reg.exe'\n              - '\\powershell.exe'\n              - '\\pwsh.exe'\n        - OriginalFileName:\n              - 'reg.exe'\n              - 'PowerShell.EXE'\n              - 'pwsh.dll'\n    selection_cli_action:\n        CommandLine|contains:\n            - 'add '\n            - 'Set-ItemProperty'\n            - 'New-ItemProperty'\n            - 'si ' # Set-ItemProperty alias\n    selection_cli_base:\n        CommandLine|contains: '\\Control\\WMI\\Autologger\\'\n    selection_cli_key:\n        CommandLine|contains:\n            - 'Start' # Key used to disable specific autologger session like EventLog-Application, EventLog-System etc.\n            - 'Enabled' # Key used to disable specific provider of autologger session\n    condition: all of selection_*\nfalsepositives:\n    - Unknown\nlevel: high\nregression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_autologger_session_registry_modification/info.yml\nsimulation:\n    - type: atomic-red-team\n      name: Disable EventLog-Application Auto Logger Session Via Registry - Cmd\n      technique: T1562.001\n      atomic_guid: 653c6e17-14a2-4849-851d-f1c0cc8ea9ab\n    - type: atomic-red-team\n      name: Disable EventLog-Application Auto Logger Session Via Registry - PowerShell\n      technique: T1562.001\n      atomic_guid: da86f239-9bd3-4e85-92ed-4a94ef111a1c\n    - type: atomic-red-team\n      name: Disable EventLog-Application ETW Provider Via Registry - Cmd\n      technique: T1562.001\n      atomic_guid: 1cac9b54-810e-495c-8aac-989e0076583b\n    - type: atomic-red-team\n      name: Disable EventLog-Application ETW Provider Via Registry - PowerShell\n      technique: T1562.001\n      atomic_guid: 8f907648-1ebf-4276-b0f0-e2678ca474f0\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1685.001","id":"T1685.001","name":"Disable or Modify Windows Event Log","page":"techniques/enterprise/T1685.001/"}],"data_path":"data/detection-rules/d7b81144-b866-48a4-9bcc-275dc69d870e.json","kind":"sigma"}