Threat Huntlowtest

Process Terminated Via Taskkill

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.

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch

François Hubaut, MalGamy (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)Created Sun Dec 26Updated Sun Oct 0686085955-ea48-42a2-9dd3-85d4c36b167dwindows

Hunting Hypothesis

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

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_*