e7f84927-3fb4-41c9-b2fc-e87985cfbcc3

bootarm.efi :inline

Description

This was provided by Microsoft and revoked May-23

  • UUID: e7f84927-3fb4-41c9-b2fc-e87985cfbcc3
  • 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\bootarm.efi } }
Use CasePrivilegesOperating System
Persistence32-bit ARM

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 10 version 1507

    • Known Vulnerable Samples

    PropertyValue
    Filenamebootarm.efi
    MD5
    SHA1
    SHA25694F92895ED36D4EA45B0942E755640420AF5CA3B8E3EA855FC6A39C9A3661666
    Authentihash MD5
    Authentihash SHA1
    Authentihash SHA256AF3BBF0C275BDD5EBD8A87F00263847485572F8A983DEF0EAE9895CD93D7FFC3

    Imports

    Expand

    Imports

    Expand

    ImportedFunctions

    Expand

    ExportedFunctions

    Expand

    Signature

    Expand

    source

    last_updated: 2023-08-31