0acd4573-d0e2-4f57-8c94-3d6e57a391e7

shimaa64.efi :inline

Description

This was provided by Canonical Ltd and revoked Apr-21

  • UUID: 0acd4573-d0e2-4f57-8c94-3d6e57a391e7
  • 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\shimaa64.efi } }
Use CasePrivilegesOperating System
Persistence64-bit ARM

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
    Filenameshimaa64.efi
    MD5
    SHA1
    SHA2563C6318DC79E5CE66F7DCCC71DF01C4E4ACC53F14D978011A29033D59D43D9233
    Authentihash MD5
    Authentihash SHA1
    Authentihash SHA25662B79FB4A04052FCB498A97F22A3567642D4BC47D1C2FF9A06311C8C6148E907

    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