99b952f7-5438-417b-9dab-c318bdcd75e6

99b952f7-5438-417b-9dab-c318bdcd75e6 :inline

Description

This was provided by Unknown and revoked Jul-20

  • UUID: 99b952f7-5438-417b-9dab-c318bdcd75e6
  • 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
    SHA256B6C36B2B18A3E73EA007173F8669D9A9A861FDDF27C3E3C0C3F1315E2AE5B43F
    Authentihash MD5
    Authentihash SHA1
    Authentihash SHA25661CEC4A377BF5902C0FEAEE37034BF97D5BC6E0615E23A1CDFBAE6E3F5FB3CFD

    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