Sysmon Channel Reference Deletion

calendar Oct 25, 2022 · attack.defense_evasion attack.t1112  ·
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Potential threat actor tampering with Sysmon manifest and eventually disabling it

Sigma rule (View on GitHub)

 1title: Sysmon Channel Reference Deletion
 2id: 18beca67-ab3e-4ee3-ba7a-a46ca8d7d0cc
 3status: test
 4description: Potential threat actor tampering with Sysmon manifest and eventually disabling it
 5references:
 6    - https://twitter.com/Flangvik/status/1283054508084473861
 7    - https://twitter.com/SecurityJosh/status/1283027365770276866
 8    - https://securityjosh.github.io/2020/04/23/Mute-Sysmon.html
 9    - https://gist.github.com/Cyb3rWard0g/cf08c38c61f7e46e8404b38201ca01c8
10author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
11date: 2020/07/14
12modified: 2022/10/05
13tags:
14    - attack.defense_evasion
15    - attack.t1112
16logsource:
17    product: windows
18    service: security
19detection:
20    selection1:
21        EventID: 4657
22        ObjectName|contains:
23            - 'WINEVT\Publishers\{5770385f-c22a-43e0-bf4c-06f5698ffbd9}'
24            - 'WINEVT\Channels\Microsoft-Windows-Sysmon/Operational'
25        ObjectValueName: 'Enabled'
26        NewValue: 0
27    selection2:
28        EventID: 4663
29        ObjectName|contains:
30            - 'WINEVT\Publishers\{5770385f-c22a-43e0-bf4c-06f5698ffbd9}'
31            - 'WINEVT\Channels\Microsoft-Windows-Sysmon/Operational'
32        AccessMask: 0x10000
33    condition: 1 of selection*
34falsepositives:
35    - Unknown
36level: high

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