Sysmon Configuration Update

calendar Jul 1, 2026 · attack.defense-impairment attack.t1685  ·
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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

Sigma rule (View on GitHub)

 1title: Sysmon Configuration Update
 2id: 87911521-7098-470b-a459-9a57fc80bdfd
 3status: test
 4description: 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
 5references:
 6    - https://learn.microsoft.com/en-us/sysinternals/downloads/sysmon
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2023-03-09
 9modified: 2026-06-29
10tags:
11    - attack.defense-impairment
12    - attack.t1685
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_pe:
18        - Image|endswith:
19              - \Sysmon64.exe
20              - \Sysmon64a.exe
21              - \Sysmon.exe
22        - Description: 'System activity monitor'
23    selection_cli:
24        CommandLine|contains|windash: '-c'
25    condition: all of selection_*
26falsepositives:
27    - Legitimate administrators might use this command to update Sysmon configuration.
28level: medium

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