1f6808e6-5b11-4cb3-b2d7-427ea75c1f9e

BOOTX64.EFI :inline

Description

This was provided by Ciscso Systems Inc. and revoked Jul-20

  • UUID: 1f6808e6-5b11-4cb3-b2d7-427ea75c1f9e
  • 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\BOOTX64.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
    FilenameBOOTX64.EFI
    MD5cd3a08a351a1e5286fdabeb5bbf371e7
    SHA155f93fee3283aa27b1d8b20d1d4d85b770e923aa
    SHA2562df05c41acc56d0f4c9371da62ec6cb311c9afb84b4a4d8c3738583ccc874d38
    Authentihash MD519a8ebfdc4acec4f18411de1412ef702
    Authentihash SHA1e91507cdff068f305c149e89d25038e3a665e461
    Authentihash SHA256c805603c4fa038776e42f263c604b49d96840322e1922d5606a9b0bbb5bffe6f
    RichPEHeaderHash MD5ffdf660eb1ebf020a1d0a55a90712dfb
    RichPEHeaderHash SHA13e905e3d061d0d59de61fcf39c994fcb0ec1bab3
    RichPEHeaderHash SHA2562b3f99a94b7a7132854be769e27b331419c53989ef42f686d6f5ba09ddefefd6

    Certificates

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    Certificate 330000002b4b79b3694d12118700010000002b
    FieldValue
    ToBeSigned (TBS) MD58d8a1f204c9c80213bd427fa58b387e2
    ToBeSigned (TBS) SHA18d78e1742b948f0c8298e560dd71fe1594020386
    ToBeSigned (TBS) SHA2561bb427b8e9fe460f567310886852fded2aeec70819123b815daab17d1601bca0
    SubjectC=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Windows UEFI Driver Publisher
    ValidFrom2018-07-03 20:53:01
    ValidTo2019-07-26 20:53:01
    Signature54b771f3cef2a39bed4a43589d904c162be7f81b194f02873b74d01ca889553330964be53fdd5f76d346d229e26a5c8e5385e4bb316ffc07317bbe9e1eb58c26b69b793c48801a67c75ae9110e6b0d5704e194f01485478ad0894ea7bdfd053a54bc4d7179b910290bd32006e1d3e670e62c901fcf688f5831d145ddc4acc827c2ede6a6fef612534cdf453c0fca315e1c7c6d9f1a7418eddd53996657e0b0caccaaee5e57c54b07ce33b85447f7dee99fc222785c4c4597dda90599daeb46af237bb2c9714f8b39ca7326d1ceb5757d125034b649befcbf1f666c6e1246bfd2daae96b62ecaa94225e0e4b26133b98fd10d4c81fdfdefbad67ffb645290ddae
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityFalse
    SerialNumber330000002b4b79b3694d12118700010000002b
    Version3
    Certificate 6108d3c4000000000004
    FieldValue
    ToBeSigned (TBS) MD51f23e75a000f0b6db92650dc26ac98e1
    ToBeSigned (TBS) SHA1bc477f73f16f0a5ae09e8ce4745c0a79c0e9a39d
    ToBeSigned (TBS) SHA2569589b8c95168f79243f61922faa5990de0a4866de928736fed658ea7bff1a5e2
    SubjectC=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Corporation UEFI CA 2011
    ValidFrom2011-06-27 21:22:45
    ValidTo2026-06-27 21:32:45
    Signature350842ff30cccef7760cad1068583529463276277cef124127421b4aaa6d813848591355f3e95834a6160b82aa5dad82da808341068fb41df203b9f31a5d1bf15090f9b3558442281c20bdb2ae5114c5c0ac9795211c90db0ffc779e95739188cabdbd52b905500ddf579ea061ed0de56d25d9400f1740c8cea34ac24daf9a121d08548fbdc7bcb92b3d492b1f32fc6a21694f9bc87e4234fc3606178b8f2040c0b39a257527cdc903a3f65dd1e736547ab950b5d312d107bfbb74dfdc1e8f80d5ed18f42f14166b2fde668cb023e5c784d8edeac13382ad564b182df1689507cdcff072f0aebbdd8685982c214c332bf00f4af06887b592553275a16a826a3ca32511a4edadd704aecbd84059a084d1954c6291221a741d8c3d470e44a6e4b09b3435b1fab653a82c81eca40571c89db8bae81b4466e447540e8e567fb39f1698b286d0683e9023b52f5e8f50858dc68d825f41a1f42e0de099d26c75e4b669b52186fa07d1f6e24dd1daad2c77531e253237c76c52729586b0f135616a19f5b23b815056a6322dfea289f94286271855a182ca5a9bf830985414a64796252fc826e441941a5c023fe596e3855b3c3e3fbb47167255e22522b1d97be703062aa3f71e9046c3000dd61989e30e352762037115a6efd027a0a0593760f83894b8e07870f8ba4c868794f6e0ae0245ee65c2b6a37e69167507929bf5a6bc598358
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityTrue
    SerialNumber6108d3c4000000000004
    Version3

    Imports

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    Imports

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    ImportedFunctions

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    ExportedFunctions

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    Signature

    Expand
    {
  "Certificates": [
    {
      "IsCertificateAuthority": false,
      "SerialNumber": "330000002b4b79b3694d12118700010000002b",
      "Signature": "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",
      "SignatureAlgorithmOID": "1.2.840.113549.1.1.11",
      "Subject": "C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Windows UEFI Driver Publisher",
      "TBS": {
        "MD5": "8d8a1f204c9c80213bd427fa58b387e2",
        "SHA1": "8d78e1742b948f0c8298e560dd71fe1594020386",
        "SHA256": "1bb427b8e9fe460f567310886852fded2aeec70819123b815daab17d1601bca0"
      },
      "ValidFrom": "2018-07-03 20:53:01",
      "ValidTo": "2019-07-26 20:53:01",
      "Version": 3
    },
    {
      "IsCertificateAuthority": true,
      "SerialNumber": "6108d3c4000000000004",
      "Signature": "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",
      "SignatureAlgorithmOID": "1.2.840.113549.1.1.11",
      "Subject": "C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Corporation UEFI CA 2011",
      "TBS": {
        "MD5": "1f23e75a000f0b6db92650dc26ac98e1",
        "SHA1": "bc477f73f16f0a5ae09e8ce4745c0a79c0e9a39d",
        "SHA256": "9589b8c95168f79243f61922faa5990de0a4866de928736fed658ea7bff1a5e2"
      },
      "ValidFrom": "2011-06-27 21:22:45",
      "ValidTo": "2026-06-27 21:32:45",
      "Version": 3
    }
  ],
  "CertificatesInfo": "",
  "Signer": [
    {
      "Issuer": "C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Corporation UEFI CA 2011",
      "SerialNumber": "330000002b4b79b3694d12118700010000002b",
      "Version": 1
    }
  ],
  "SignerInfo": ""
}

    source

    last_updated: 2023-08-31