18b807f0-bafd-4f25-8f7d-e2ff15fb5691

bootmgfw.efi :inline

Description

This was provided by Microsoft and revoked Jul-20

  • UUID: 18b807f0-bafd-4f25-8f7d-e2ff15fb5691
  • 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\bootmgfw.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
    Filenamebootmgfw.efi
    MD5c86257e19730c49e2abfbdf19e322c49
    SHA16a9e3957a060061c09a674ed338df34af8f23540
    SHA256f88e92940985413acd440daa20c08df99c54613636826d9d95b898d39c44b19b
    Authentihash MD524dca2244a6220a9bb1962697f8aa2f0
    Authentihash SHA12688b0ed81c02678e9884b32b6ef0fd603930cd7
    Authentihash SHA256148fe18f715a9fcfe1a444ce0fff7f85869eb422330dc04b314c0f295d6da79e
    RichPEHeaderHash MD5ffdf660eb1ebf020a1d0a55a90712dfb
    RichPEHeaderHash SHA13e905e3d061d0d59de61fcf39c994fcb0ec1bab3
    RichPEHeaderHash SHA2562b3f99a94b7a7132854be769e27b331419c53989ef42f686d6f5ba09ddefefd6

    Certificates

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    Certificate 33000000081eb17e9c15fc837a000100000008
    FieldValue
    ToBeSigned (TBS) MD5c5e24205d04c09c94d81b6935af7ec09
    ToBeSigned (TBS) SHA112622dccb5b07edfd65cae6fc018e24b80ff2c82
    ToBeSigned (TBS) SHA256d6afbff1c283d7777501bd3b2adb4aadb8ce32649ee401dfbb06f884362f7507
    SubjectC=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=MOPR, CN=Microsoft Windows UEFI Driver Publisher
    ValidFrom2012-07-02 22:25:14
    ValidTo2013-10-02 22:25:14
    Signature840831439e4e63e88d00e1b0c0678d70bb89f466e9027ab28177926d5def8175b3240e729f943f1e6bd94a0f27c92e696a5001c0747f6bf7574c09e8485a5eb6d7024244ddd73236c28e9dfad58ec5098b74516234232552d9230c1d0ddae73108b0a0144bd9e9265dac56ebdcce7512cf3627a6858d41876ede19d35e0e27957a6896aae9ea150098327450fe7c72385aac6feff0616b3d066cd0be7e5a537bb18488c67db9f0731c30ac7918fe977b4250ffbfbeea81e1ba3b8a0305b9374f0d22453781cc5823b5faad5e50e84306381f83382fe0ed8b176a9c9ff1868cc6543e7f12b1f112adc62430fd1ba530d877a290f0d2e09eacce07ed37ec439c25
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityFalse
    SerialNumber33000000081eb17e9c15fc837a000100000008
    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": "33000000081eb17e9c15fc837a000100000008",
      "Signature": "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",
      "SignatureAlgorithmOID": "1.2.840.113549.1.1.11",
      "Subject": "C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=MOPR, CN=Microsoft Windows UEFI Driver Publisher",
      "TBS": {
        "MD5": "c5e24205d04c09c94d81b6935af7ec09",
        "SHA1": "12622dccb5b07edfd65cae6fc018e24b80ff2c82",
        "SHA256": "d6afbff1c283d7777501bd3b2adb4aadb8ce32649ee401dfbb06f884362f7507"
      },
      "ValidFrom": "2012-07-02 22:25:14",
      "ValidTo": "2013-10-02 22:25:14",
      "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": "33000000081eb17e9c15fc837a000100000008",
      "Version": 1
    }
  ],
  "SignerInfo": ""
}

    source

    last_updated: 2023-08-31