blue-team-tools/rules/windows/process_creation/proc_creation_win_schtasks_delete.yml

title: Delete Important Scheduled Task
id: dbc1f800-0fe0-4bc0-9c66-292c2abe3f78
related:
    - id: 9e3cb244-bdb8-4632-8c90-6079c8f4f16d # TaskScheduler EventLog
      type: similar
    - id: 7595ba94-cf3b-4471-aa03-4f6baa9e5fad # Security-Audting Eventlog
      type: similar
status: experimental
description: Detects when adversaries stop services or processes by deleting their respective scheduled tasks in order to conduct data destructive activities
references:
    - Internal Research
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022/09/09
tags:
    - attack.impact
    - attack.t1489
logsource:
    category: process_creation
    product: windows
detection:
    schtasks_exe:
        Image|endswith: '\schtasks.exe'
        CommandLine|contains|all:
            - '/delete'
            - '/tn'
        CommandLine|contains:
            # Add more important tasks
            - '\Windows\SystemRestore\SR'
            - '\Windows\Windows Defender\'
            - '\Windows\BitLocker'
            - '\Windows\WindowsBackup\'
            - '\Windows\WindowsUpdate\'
            - '\Windows\UpdateOrchestrator\'
            - '\Windows\ExploitGuard'
    condition: all of schtasks_*
falsepositives:
    - Unlikely
level: high