dfa9cb92-1691-442f-96df-9692e4ab29c4

bootmgfw.efi :inline

Description

This was provided by Microsoft and revoked May-23

  • UUID: dfa9cb92-1691-442f-96df-9692e4ab29c4
  • 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 🔎

Expand

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

  • Black Lotus Microsoft Windows 8.1

    • Known Vulnerable Samples

    PropertyValue
    Filenamebootmgfw.efi
    MD53aaa631aa80579a7ec4606f002de3436
    SHA1293ba261a22d2b62ac580140be62676856d48527
    SHA256d038eec123e1e13ab3ad27534de697c9779e9c27c62575f06771f80d3cbb7148
    Authentihash MD513c9c74d08c33a6231d859bb35a060bf
    Authentihash SHA1833319ae7ee8fd2da9705d51d32ef1a6fd22e2fd
    Authentihash SHA2566f53cd5bf434b19b4e14ca127c596752079d989fcc98bb7d7cf3155619ec347d
    RichPEHeaderHash MD5aaf18af925d829095e017c505f1a0039
    RichPEHeaderHash SHA1c3d13f7d96127a3b16c7a8c0a3dd98fd9f22c3cf
    RichPEHeaderHash SHA25605367ecae4cf78cc575048fb931468b1d210df8c38ff8ca05481124b1a1a6917
    CompanyMicrosoft Corporation
    DescriptionBoot Manager
    ProductMicrosoft® Windows® Operating System
    OriginalFilenamebootmgr.exe

    Certificates

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    Certificate 330000033c89c66a7b45bb1fbd00000000033c
    FieldValue
    ToBeSigned (TBS) MD546f57c3b860b08484cb79066ac1014ad
    ToBeSigned (TBS) SHA1c1fe3ab97b834a98460e4ae92fe2468d16f61a92
    ToBeSigned (TBS) SHA256d78e6b22fec42de5200f6c56731dd6742c79fa2bf7c01c8dc04d3d5738474c9b
    SubjectC=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Windows
    ValidFrom2021-09-02 18:23:41
    ValidTo2022-09-01 18:23:41
    Signature699045742c403812de1bdf9ea2be22132e82a7c006ab278e0c9f460bd435386348031a6b5cbdf450ae5a243331dcb2cc7eace8371cf71ec35a6f663147bd211ea357614e6a611eeacca6486a778d4cd788106ade12d6625574e7a89ecab4eb0bb99295c498dd5f565680a2d26bf2545e727c4204023c48d8021b608fd901c6fefd16ce0c3a669fb0ce758dc671f2cdd7434c163f9de9453e5523d94a78205c828a4615e50330d9f52a8a77f7683d2b61ff1324382d40d31001c518b56b286fbb8c754f6940590c2071385ed0a9387b529c06bf71fff89c74634550fc331b389d558696ace05787144e5af53d20a75a84981bf8380ddac3743f407d8ff27c089e
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityFalse
    SerialNumber330000033c89c66a7b45bb1fbd00000000033c
    Version3
    Certificate 61077656000000000008
    FieldValue
    ToBeSigned (TBS) MD530a3f0b64324ed7f465e7fc618cb69e7
    ToBeSigned (TBS) SHA1002de3561519b662c5e3f5faba1b92c403fb7c41
    ToBeSigned (TBS) SHA2564e80be107c860de896384b3eff50504dc2d76ac7151df3102a4450637a032146
    SubjectC=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Windows Production PCA 2011
    ValidFrom2011-10-19 18:41:42
    ValidTo2026-10-19 18:51:42
    Signature14fc7c7151a579c26eb2ef393ebc3c520f6e2b3f101373fea868d048a6344d8a960526ee3146906179d6ff382e456bf4c0e528b8da1d8f8adb09d71ac74c0a36666a8cec1bd70490a81817a49bb9e240323676c4c15ac6bfe404c0ea16d3acc368ef62acdd546c503058a6eb7cfe94a74e8ef4ec7c867357c2522173345af3a38a56c804da0709edf88be3cef47e8eaef0f60b8a08fb3fc91d727f53b8ebbe63e0e33d3165b081e5f2accd16a49f3da8b19bc242d090845f541dff89eaba1d47906fb0734e419f409f5fe5a12ab21191738a2128f0cede73395f3eab5c60ecdf0310a8d309e9f4f69685b67f51886647198da2b0123d812a680577bb914c627bb6c107c7ba7a8734030e4b627a99e9cafcce4a37c92da4577c1cfe3ddcb80f5afad6c4b30285023aeab3d96ee4692137de81d1f675190567d393575e291b39c8ee2de1cde445735bd0d2ce7aab1619824658d05e9d81b367af6c35f2bce53f24e235a20a7506f6185699d4782cd1051bebd088019daa10f105dfba7e2c63b7069b2321c4f9786ce2581706362b911203cca4d9f22dbaf9949d40ed1845f1ce8a5c6b3eab03d370182a0a6ae05f47d1d5630a32f2afd7361f2a705ae5425908714b57ba7e8381f0213cf41cc1c5b990930e88459386e9b12099be98cbc595a45d62d6a0630820bd7510777d3df345b99f979fcb57806f33a904cf77a4621c597e
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityTrue
    SerialNumber61077656000000000008
    Version3

    Imports

    Expand

    Imports

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    ImportedFunctions

    Expand

    ExportedFunctions

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    Signature

    Expand
    {
  "Certificates": [
    {
      "IsCertificateAuthority": false,
      "SerialNumber": "330000033c89c66a7b45bb1fbd00000000033c",
      "Signature": "699045742c403812de1bdf9ea2be22132e82a7c006ab278e0c9f460bd435386348031a6b5cbdf450ae5a243331dcb2cc7eace8371cf71ec35a6f663147bd211ea357614e6a611eeacca6486a778d4cd788106ade12d6625574e7a89ecab4eb0bb99295c498dd5f565680a2d26bf2545e727c4204023c48d8021b608fd901c6fefd16ce0c3a669fb0ce758dc671f2cdd7434c163f9de9453e5523d94a78205c828a4615e50330d9f52a8a77f7683d2b61ff1324382d40d31001c518b56b286fbb8c754f6940590c2071385ed0a9387b529c06bf71fff89c74634550fc331b389d558696ace05787144e5af53d20a75a84981bf8380ddac3743f407d8ff27c089e",
      "SignatureAlgorithmOID": "1.2.840.113549.1.1.11",
      "Subject": "C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Windows",
      "TBS": {
        "MD5": "46f57c3b860b08484cb79066ac1014ad",
        "SHA1": "c1fe3ab97b834a98460e4ae92fe2468d16f61a92",
        "SHA256": "d78e6b22fec42de5200f6c56731dd6742c79fa2bf7c01c8dc04d3d5738474c9b"
      },
      "ValidFrom": "2021-09-02 18:23:41",
      "ValidTo": "2022-09-01 18:23:41",
      "Version": 3
    },
    {
      "IsCertificateAuthority": true,
      "SerialNumber": "61077656000000000008",
      "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 Production PCA 2011",
      "TBS": {
        "MD5": "30a3f0b64324ed7f465e7fc618cb69e7",
        "SHA1": "002de3561519b662c5e3f5faba1b92c403fb7c41",
        "SHA256": "4e80be107c860de896384b3eff50504dc2d76ac7151df3102a4450637a032146"
      },
      "ValidFrom": "2011-10-19 18:41:42",
      "ValidTo": "2026-10-19 18:51:42",
      "Version": 3
    }
  ],
  "CertificatesInfo": "",
  "Signer": [
    {
      "Issuer": "C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Windows Production PCA 2011",
      "SerialNumber": "330000033c89c66a7b45bb1fbd00000000033c",
      "Version": 1
    }
  ],
  "SignerInfo": ""
}

    source

    last_updated: 2023-08-31