4e4ca92c-52eb-4289-a935-f6ec64b79e3a

bootmgfw.efi :inline

Description

This was provided by Microsoft and revoked May-23

  • UUID: 4e4ca92c-52eb-4289-a935-f6ec64b79e3a
  • Created: 2023-05-22
  • Author: Michael Haag
  • Acknowledgement: |

Download

This download link contains the Revoked Bootloader!

Commands

bcdedit /copy "{current}" /d "TheBoots" | {% if ($_ -match '{\S+}') { bcdedit /set $matches[0] path \windows\temp\bootmgfw.efi } }
Use CasePrivilegesOperating System
Persistence64-bit

Detections

YARA 🏹

Expand

Exact Match

with header and size limitation

Threat Hunting

without header and size limitation

Renamed

for renamed bootloader files

Sigma 🛡️

Expand

Names

detects loading using name only

Hashes

detects loading using hashes only

Sysmon 🔎

Expand

Block

on hashes

Alert

on hashes

Resources


  • https://uefi.org/revocationlistfile
  • https://support.microsoft.com/en-gb/topic/microsoft-guidance-for-applying-secure-boot-dbx-update-kb4575994-e3b9e4cb-a330-b3ba-a602-15083965d9ca

    • CVE

  • Black Lotus Microsoft Windows 8.1

    • Known Vulnerable Samples

    PropertyValue
    Filenamebootmgfw.efi
    MD5
    SHA1
    SHA256DA9C62E148457AFB0629FAB0C2D58623F9AC35A9A95EF23388ECFE85451C60C0
    Authentihash MD5
    Authentihash SHA1
    Authentihash SHA256326967C7FFC1B86DB8B32B0570E88A89CC1534CFCF300B98C077E473F9B18FA1

    Imports

    Expand

    Imports

    Expand

    ImportedFunctions

    Expand

    ExportedFunctions

    Expand

    Signature

    Expand

    source

    last_updated: 2023-08-31