c8bbda28-7392-4588-a899-755c58de432b

shim-0.4-0ubuntu4/shim64-bit.efi :inline

Description

This was provided by Canonical Ltd and revoked Apr-21

  • UUID: c8bbda28-7392-4588-a899-755c58de432b
  • 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\shim-0.4-0ubuntu4/shim64-bit.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-2020-14372
  • CVE-2020-25632
  • CVE-2020-25647
  • CVE-2020-27749
  • CVE-2020-27779
  • CVE-2021-3418
  • CVE-2021-20225
  • CVE-2021-20233

    • Known Vulnerable Samples

    PropertyValue
    Filenameshim-0.4-0ubuntu4/shim64-bit.efi
    MD58712d45e1ae024cb45067ad5918e12da
    SHA1a6aa33d40dacfcc964b01a5c18d26829d362fbce
    SHA256702a10fa1541869f455143ed00425e4e9b2d533c3b639259bde6aac97eca15ed
    Authentihash MD515d38ac115b29438f9f82509f78c340a
    Authentihash SHA1c017bdf23c9fae3f7c66a28aaefa4ce95d174a71
    Authentihash SHA2561db183cf5655b2dd0ce9508273b339146c3b7dcdec0d0ac3c180c953083faf18
    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