Wermgr.exe spawning without command line arguments

Wermgr.exe should not spawn without any command line arguments. Sometimes malware are using process injection to masquerade their malicious activities and evade detection.

Sigma rule (View on GitHub)

 1title: Wermgr.exe spawning without command line arguments
 2id: 735e43b1-8533-4b37-91a6-5bf89a671884
 3description: Wermgr.exe should not spawn without any command line arguments. Sometimes malware are using process injection to masquerade their malicious activities and evade detection.
 4references:
 5    - https://x.com/Kostastsale/status/1570178125400776705
 6status: experimental
 7date: 2022/09/14
 8author: '@kostastsale'
 9logsource:
10    category: process_creation
11    product: windows
12detection:
13    selection1:
14        Image|endswith:
15            - '\wermgr.exe'
16        CommandLine|endswith:
17            - '\wermgr.exe'
18    condition: selection1
19falsepositives:
20    - Unlikely
21level: high
22tags:
23    - attack.Defense Evasion
24    - attack.T1218

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