bfdc85a7-3cc9-4d18-b798-0fd82f9c5e85

bootmgfw.efi :inline

Description

This was provided by Microsoft and revoked May-23

  • UUID: bfdc85a7-3cc9-4d18-b798-0fd82f9c5e85
  • 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
Persistence32-bit ARM

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
    SHA25678D6FDE56994BCF26964ED51DF446165DAD66BCB0BC6792B9EDD2850F19DEA4F
    Authentihash MD5
    Authentihash SHA1
    Authentihash SHA25664CCC886EB99C30AA808E5CA9BD371577BAF9D3FA0E450118464F514B47A028A

    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