d1441172-cc15-4a96-b782-f440bfb681e1

b4.sys

We were not able to verify the hash of this driver successfully, it has not been confirmed.

Description

b4.sys is a vulnerable driver and more information will be added as found.

  • UUID: d1441172-cc15-4a96-b782-f440bfb681e1
  • Created: 2023-01-09
  • Author: Michael Haag
  • Acknowledgement: |

Commands

sc.exe create b4.sys binPath=C:\windows\temp\b4.sys type=kernel && sc.exe start b4.sys
Use CasePrivilegesOperating System
Elevate privilegeskernelWindows 10

Detections

YARA 🏹

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Exact Match

with header and size limitation

Threat Hunting

without header and size limitation

Renamed

for renamed driver files

Sigma 🛡️

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Names

detects loading using name only

Hashes

detects loading using hashes only

Sysmon 🔎

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Block

on hashes

Alert

on hashes

Resources


  • https://learn.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-driver-block-rules
  • https://learn.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-driver-block-rules

    • Known Vulnerable Samples

    PropertyValue
    Filenameb4.sys
    Creation Timestamp
    MD5
    SHA1
    SHA256dec8a933dba04463ed9bb7d53338ff87f2c23cfb79e0e988449fc631252c9dcc

    Imports

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    Imported Functions

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    Exported Functions

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    Sections

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    Signature

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    source

    last_updated: 2024-04-09