Potential Ransomware or Unauthorized MBR Tampering Via Bcdedit.EXE

Detects potential malicious and unauthorized usage of bcdedit.exe

Sigma rule (View on GitHub)

 1title: Potential Ransomware or Unauthorized MBR Tampering Via Bcdedit.EXE
 2id: c9fbe8e9-119d-40a6-9b59-dd58a5d84429
 3status: test
 4description: Detects potential malicious and unauthorized usage of bcdedit.exe
 5references:
 6    - https://learn.microsoft.com/en-us/windows-hardware/drivers/devtest/bcdedit--set
 7    - https://twitter.com/malwrhunterteam/status/1372536434125512712/photo/2
 8author: '@neu5ron'
 9date: 2019/02/07
10modified: 2023/02/15
11tags:
12    - attack.defense_evasion
13    - attack.t1070
14    - attack.persistence
15    - attack.t1542.003
16logsource:
17    category: process_creation
18    product: windows
19detection:
20    selection_img:
21        - Image|endswith: '\bcdedit.exe'
22        - OriginalFileName: 'bcdedit.exe'
23    selection_cli:
24        CommandLine|contains:
25            - 'delete'
26            - 'deletevalue'
27            - 'import'
28            - 'safeboot'
29            - 'network'
30    condition: all of selection_*
31level: medium

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