cb5a22b9-4471-44a3-9783-c27df207f95a

bootmgfw.efi :inline

Description

This was provided by Microsoft and revoked May-23

  • UUID: cb5a22b9-4471-44a3-9783-c27df207f95a
  • 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 🏹

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Exact Match

with header and size limitation

Threat Hunting

without header and size limitation

Renamed

for renamed bootloader 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://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
    SHA256B1EC3A20DD620668852C057FD33023CB945D35122C079F13A59A73F8A4E4FC12
    Authentihash MD5
    Authentihash SHA1
    Authentihash SHA256264CBC5765718A0BCCB0F79C0FDD133A898203FB6F4F2052CB0647FBF6000ED0

    Imports

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    Imports

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    ImportedFunctions

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    ExportedFunctions

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    Signature

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    source

    last_updated: 2023-08-31