Detection rules › Sigma
UEFI Persistence Via Wpbbin - FileCreation
Detects creation of a file named "wpbbin" in the "%systemroot%\system32" directory. Which could be indicative of UEFI based persistence method
Known false positives
- Legitimate usage of the file by hardware manufacturer such as lenovo (Thanks @0gtweet for the tip)
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 11: FileCreate |
Rule body
title: UEFI Persistence Via Wpbbin - FileCreation
id: e94b9ddc-eec5-4bb8-8a58-b9dc5f4e185f
status: test
description: Detects creation of a file named "wpbbin" in the "%systemroot%\system32\" directory. Which could be indicative of UEFI based persistence method
references:
- https://grzegorztworek.medium.com/using-uefi-to-inject-executable-files-into-bitlocker-protected-drives-8ff4ca59c94c
- https://persistence-info.github.io/Data/wpbbin.html
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-07-18
tags:
- attack.persistence
- attack.stealth
- attack.t1542.001
logsource:
product: windows
category: file_event
detection:
selection:
TargetFilename: 'C:\Windows\System32\wpbbin.exe'
condition: selection
falsepositives:
- Legitimate usage of the file by hardware manufacturer such as lenovo (Thanks @0gtweet for the tip)
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
TargetFilename: 'C:\Windows\System32\wpbbin.exe'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
TargetFilename | eq |
| field:"TargetFilename" kind:eq value:"C:\Windows\System32\wpbbin.exe" |