{"id":"9e3cb244-bdb8-4632-8c90-6079c8f4f16d","title":"Important Scheduled Task Deleted or Disabled","description":"Detects when adversaries try to stop system services or processes by deleting or disabling their respective scheduled tasks in order to conduct data destructive activities\n","author":"frack113","status":"test","level":"high","date":"2023-01-13","modified":"2026-03-11","tags":["attack.impact","attack.t1489"],"technique_ids":["T1489"],"logsource":{"product":"windows","service":"taskscheduler","definition":"Requirements: The \"Microsoft-Windows-TaskScheduler/Operational\" is disabled by default and needs to be enabled in order for this detection to trigger"},"falsepositives":["Unknown"],"references":["https://www.socinvestigation.com/most-common-windows-event-ids-to-hunt-mind-map/"],"source_path":"rules/windows/builtin/taskscheduler/win_taskscheduler_susp_schtasks_delete_or_disable.yml","source_sha256":"f739a8c043b6de219bb4a0ce04fd350e1204fb1536955748e9b85b37aad585d5","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/taskscheduler/win_taskscheduler_susp_schtasks_delete_or_disable.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Important Scheduled Task Deleted or Disabled\nid: 9e3cb244-bdb8-4632-8c90-6079c8f4f16d\nrelated:\n    - id: dbc1f800-0fe0-4bc0-9c66-292c2abe3f78 # ProcCreation schtasks delete\n      type: similar\n    - id: 7595ba94-cf3b-4471-aa03-4f6baa9e5fad # Security-Audting Eventlog\n      type: similar\n    - id: 9ac94dc8-9042-493c-ba45-3b5e7c86b980 # ProcCreation schtasks disable\n      type: similar\nstatus: test\ndescription: |\n    Detects when adversaries try to stop system services or processes by deleting or disabling their respective scheduled tasks in order to conduct data destructive activities\nreferences:\n    - https://www.socinvestigation.com/most-common-windows-event-ids-to-hunt-mind-map/\nauthor: frack113\ndate: 2023-01-13\nmodified: 2026-03-11\ntags:\n    - attack.impact\n    - attack.t1489\nlogsource:\n    product: windows\n    service: taskscheduler\n    definition: 'Requirements: The \"Microsoft-Windows-TaskScheduler/Operational\" is disabled by default and needs to be enabled in order for this detection to trigger'\ndetection:\n    selection:\n        EventID:\n            - 141 # Task Deleted\n            - 142 # Task Disabled\n        TaskName|contains:\n            - '\\Windows\\SystemRestore\\SR'\n            - '\\Windows\\Windows Defender\\'\n            - '\\Windows\\BitLocker'\n            - '\\Windows\\WindowsBackup\\'\n            - '\\Windows\\WindowsUpdate\\'\n            - '\\Windows\\UpdateOrchestrator\\'\n            - '\\Windows\\ExploitGuard'\n    filter_main_user:\n        UserName|contains:\n            - 'AUTHORI'\n            - 'AUTORI'\n    condition: selection and not 1 of filter_main_*\nfalsepositives:\n    - Unknown\nlevel: high\nregression_tests_path: regression_data/rules/windows/builtin/taskscheduler/win_taskscheduler_susp_schtasks_delete_or_disable/info.yml\nsimulation:\n    - type: atomic-red-team\n      name: Windows - Disable the SR scheduled task\n      technique: T1490\n      atomic_guid: 1c68c68d-83a4-4981-974e-8993055fa034\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1489","id":"T1489","name":"Service Stop","page":"techniques/enterprise/T1489/"}],"data_path":"data/detection-rules/9e3cb244-bdb8-4632-8c90-6079c8f4f16d.json","kind":"sigma"}