1b134b19-47f4-4bfd-af37-40c05933168f

grubnetx64.efi :inline

Description

This was provided by Canonical and revoked Jul-20

  • UUID: 1b134b19-47f4-4bfd-af37-40c05933168f
  • 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\grubnetx64.efi } }
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
    Filenamegrubnetx64.efi
    MD5f383b5c1f0cb8806742c8df990bc7803
    SHA1c1f26b124fcfb2c73ec9c9cfafe3fcfbc269d4e7
    SHA2568e8addb29426d845a0101c2c1f26c2e7fe8c78128ab04f16cfcb4e06461b0101
    Authentihash MD5cba477486346b0fad728f78e3542e00e
    Authentihash SHA1cecc72f2d1a431149d9bc47f8e21b655e980e9f2
    Authentihash SHA256804e354c6368bb27a90fae8e498a57052b293418259a019c4f53a2007254490f
    RichPEHeaderHash MD5ffdf660eb1ebf020a1d0a55a90712dfb
    RichPEHeaderHash SHA13e905e3d061d0d59de61fcf39c994fcb0ec1bab3
    RichPEHeaderHash SHA2562b3f99a94b7a7132854be769e27b331419c53989ef42f686d6f5ba09ddefefd6

    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