UEFI Persistence Via Wpbbin - FileCreation

 1title: UEFI Persistence Via Wpbbin - FileCreation
 2id: e94b9ddc-eec5-4bb8-8a58-b9dc5f4e185f
 3status: test
 4description: Detects creation of a file named "wpbbin" in the "%systemroot%\system32\" directory. Which could be indicative of UEFI based persistence method
 5references:
 6    - https://grzegorztworek.medium.com/using-uefi-to-inject-executable-files-into-bitlocker-protected-drives-8ff4ca59c94c
 7    - https://persistence-info.github.io/Data/wpbbin.html
 8author: Nasreddine Bencherchali (Nextron Systems)
 9date: 2022-07-18
10tags:
11    - attack.persistence
12    - attack.defense-evasion
13    - attack.t1542.001
14logsource:
15    product: windows
16    category: file_event
17detection:
18    selection:
19        TargetFilename: 'C:\Windows\System32\wpbbin.exe'
20    condition: selection
21falsepositives:
22    - Legitimate usage of the file by hardware manufacturer such as lenovo (Thanks @0gtweet for the tip)
23level: high

References

• Using UEFI to inject executable files into BitLocker protected drives

  Injecting a file into encrypted partition sounds tempting… And there is a way to do this!

  
  Read More

• Windows Platform Binary Table

  Windows Platform Binary Table Location: UEFI Classification: Criteria Value Permissions Other Security context System Persistence type Other Code type EXE Launch type Automatic Impact Non-destructi...

  
  Read More

Related rules

• UEFI Persistence Via Wpbbin - ProcessCreation
• Abuse of Service Permissions to Hide Services Via Set-Service
• Abuse of Service Permissions to Hide Services Via Set-Service - PS
• Account Tampering - Suspicious Failed Logon Reasons
• Activity From Anonymous IP Address