a7bf3e37-f600-48ff-82d4-4f1e82c199d2

cent-7.9-20200730-shimia32.efi :inline

Description

This was provided by Red Hat, Inc. and revoked Apr-21

  • UUID: a7bf3e37-f600-48ff-82d4-4f1e82c199d2
  • 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\cent-7.9-20200730-shimia32.efi } }
Use CasePrivilegesOperating System
Persistence32-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
    Filenamecent-7.9-20200730-shimia32.efi
    MD5
    SHA1
    SHA2562D07ABD75C154055A858D4461A1B1B76D763E9ED294E2E10244C20601E072A29
    Authentihash MD5
    Authentihash SHA1
    Authentihash SHA256DDF3E4261419944F7C2F8B92F6D14C35060B4F94818CC4183F0C072706DEF726

    Imports

    Expand

    Imports

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    ImportedFunctions

    Expand

    ExportedFunctions

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    Signature

    Expand

    source

    last_updated: 2023-08-31