73af3c3c-dce6-48b2-bebf-ea167cbaef2a

73af3c3c-dce6-48b2-bebf-ea167cbaef2a :inline

Description

This was provided by HP and revoked Jul-20

  • UUID: 73af3c3c-dce6-48b2-bebf-ea167cbaef2a
  • 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\ } }
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

  • CVE-2020-10713
  • CVE-2020-14308
  • CVE-2020-14309
  • CVE-2020-14310
  • CVE-2020-14311
  • CVE-2020-15705
  • CVE-2020-15706
  • CVE-2020-15707

    • Known Vulnerable Samples

    PropertyValue
    Filename
    MD5
    SHA1
    SHA256A2BE1EB17E12E0A66A87342C9D1CFD4D7DB81504A16B4FCB32F15C6BAA3F589D
    Authentihash MD5
    Authentihash SHA1
    Authentihash SHA256E6856F137F79992DC94FA2F43297EC32D2D9A76F7BE66114C6A13EFC3BCDF5C8

    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