a7cc38fb-91b2-4e2c-a0a9-2a6051c31cb5

bootmgfw.efi :inline

Description

This was provided by Microsoft and revoked May-23

  • UUID: a7cc38fb-91b2-4e2c-a0a9-2a6051c31cb5
  • 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 10 version 1507

    • Known Vulnerable Samples

    PropertyValue
    Filenamebootmgfw.efi
    MD5
    SHA1
    SHA256E785D139C9F008F9135EDFAD44492D11D09B83373ABE74AD45B7CADD25EBB464
    Authentihash MD5
    Authentihash SHA1
    Authentihash SHA2568A03960BDEA6A4953AC50A2BBF9317BE228C2EBBC299E1E90CC7C6EB18F43B94

    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