Suspicious Sysmon Configuration Update (via process_creation)

title: Suspicious Sysmon Configuration Update (via process_creation)
id: 2d841c75-8fc4-51ed-8201-82ddf92ddcab
status: stable
description: This rule detects updates to Sysmon's configuration. Adversaries might update or replace the Sysmon configuration with a bare bone one to avoid monitoring without shutting down the service completely
references:
    - https://attack.mitre.org/techniques/T1685/
    - https://learn.microsoft.com/en-us/sysinternals/downloads/sysmon
author: Huntrule Team
date: 2026-02-01
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    category: process_creation
    product: windows
detection:
    selection_pe:
        - Image|endswith:
              - \Sysmon64.exe
              - \Sysmon64a.exe
              - \Sysmon.exe
        - Description: 'System activity monitor'
    selection_cli:
        CommandLine|contains|windash: '-c'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium