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Sysmon Configuration Update

Detects updates to Sysmon's configuration. Attackers might update or replace the Sysmon configuration with a bare bone one to avoid monitoring without shutting down the service completely

MITRE ATT&CK

T1685

Detection Query

selection_pe:
  - Image|endswith:
      - \Sysmon64.exe
      - \Sysmon.exe
  - Description: System activity monitor
selection_cli:
  CommandLine|contains|windash: -c
condition: all of selection_*

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2023-03-09

Data Sources

windowsProcess Creation Events

Platforms

windows

References

https://learn.microsoft.com/en-us/sysinternals/downloads/sysmon

Tags

attack.defense-impairmentattack.t1685

Raw Content

title: Sysmon Configuration Update
id: 87911521-7098-470b-a459-9a57fc80bdfd
status: test
description: Detects updates to Sysmon's configuration. Attackers might update or replace the Sysmon configuration with a bare bone one to avoid monitoring without shutting down the service completely
references:
    - https://learn.microsoft.com/en-us/sysinternals/downloads/sysmon
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-03-09
modified: 2024-03-13
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    category: process_creation
    product: windows
detection:
    selection_pe:
        - Image|endswith:
              - \Sysmon64.exe
              - \Sysmon.exe
        - Description: 'System activity monitor'
    selection_cli:
        CommandLine|contains|windash: '-c'
    condition: all of selection_*
falsepositives:
    - Legitimate administrators might use this command to update Sysmon configuration.
level: medium