Convert indexed Sigma rules into analyst-ready detections.

title: Process Terminated Via Taskkill
id: 86085955-ea48-42a2-9dd3-85d4c36b167d
status: test
description: |
    Detects execution of "taskkill.exe" in order to stop a service or a process. Look for suspicious parents executing this command in order to hunt for potential malicious activity.
    Attackers might leverage this in order to conduct data destruction or data encrypted for impact on the data stores of services like Exchange and SQL Server.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1489/T1489.md#atomic-test-3---windows---stop-service-by-killing-process
    - https://unit42.paloaltonetworks.com/snipbot-romcom-malware-variant/
author: frack113, MalGamy (Nextron Systems), Nasreddine Bencherchali
date: 2021-12-26
modified: 2024-10-06
tags:
    - attack.impact
    - attack.t1489
    - detection.threat-hunting
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\taskkill.exe'
        - OriginalFileName: 'taskkill.exe'
    selection_cli_force:
        - CommandLine|contains|windash: ' /f '
        - CommandLine|endswith|windash: ' /f'
    selection_cli_filter_process:
        CommandLine|contains|windash:
            - ' /im '
            - ' /pid '
    filter_main_installers:
        ParentImage|contains:
            - '\AppData\Local\Temp\'
            - ':\Windows\Temp'
        ParentImage|endswith: '.tmp'
    condition: all of selection_* and not 1 of filter_main_*
falsepositives:
    - Expected FP with some processes using this techniques to terminate one of their processes during installations and updates
level: low