title: Possible Ransomware or Unauthorized MBR Modifications
author: '@neu5ron'
date: 2019/02/07
description: Detects, possibly, malicious unauthorized usage of bcdedit.exe
detection:
  SELECTION_1:
    EventID: 1
  SELECTION_2:
    Image: '*\bcdedit.exe'
  SELECTION_3:
    CommandLine:
    - '*delete*'
    - '*deletevalue*'
    - '*import*'
    - '*safeboot*'
    - '*network*'
  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3)
id: c9fbe8e9-119d-40a6-9b59-dd58a5d84429
level: medium
logsource:
  category: process_creation
  product: windows
modified: 2021/06/18
references:
- https://docs.microsoft.com/en-us/windows-hardware/drivers/devtest/bcdedit--set
- https://twitter.com/malwrhunterteam/status/1372536434125512712/photo/2
status: experimental
tags:
- attack.defense_evasion
- attack.t1070
- attack.persistence
- attack.t1542.003
- attack.t1067
ruletype: SIGMA