Suspicious Reg Add BitLocker

 1title: Suspicious Reg Add BitLocker
 2id: 0e0255bf-2548-47b8-9582-c0955c9283f5
 3status: test
 4description: Detects suspicious addition to BitLocker related registry keys via the reg.exe utility
 5references:
 6    - https://thedfirreport.com/2021/11/15/exchange-exploit-leads-to-domain-wide-ransomware/
 7author: frack113
 8date: 2021-11-15
 9modified: 2022-09-09
10tags:
11    - attack.impact
12    - attack.t1486
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection:
18        CommandLine|contains|all:
19            - 'REG'
20            - 'ADD'
21            - '\SOFTWARE\Policies\Microsoft\FVE'
22            - '/v'
23            - '/f'
24        CommandLine|contains:
25            - 'EnableBDEWithNoTPM'
26            - 'UseAdvancedStartup'
27            - 'UseTPM'
28            - 'UseTPMKey'
29            - 'UseTPMKeyPIN'
30            - 'RecoveryKeyMessageSource'
31            - 'UseTPMPIN'
32            - 'RecoveryKeyMessage'
33    condition: selection
34falsepositives:
35    - Unlikely
36level: high