4a9f5a2f-87ca-4a7e-9a16-15d7e8a44c14

bootmgfw.efi :inline

Description

This was provided by Microsoft and revoked May-23

  • UUID: 4a9f5a2f-87ca-4a7e-9a16-15d7e8a44c14
  • 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 10 version 1507

    • Known Vulnerable Samples

    PropertyValue
    Filenamebootmgfw.efi
    MD5e2f5112aec3a2bdc5f267c18f8a6c071
    SHA1513e0049089f66a29eb06adef56eb24f1689c24d
    SHA256c643c3cc182443893728101f5303aaa05b08ec8616310546edc903635c692b5e
    Authentihash MD5a114f82ee953917e2718ad7f4765ab20
    Authentihash SHA15c145f3f55a53c1db47c568cd76eff5b0092e95b
    Authentihash SHA256f0b3d0d4c5457880e2d9b7728eb64bd288b5d4a26ec883f3c0941d8af29d9466
    RichPEHeaderHash MD5a02554021493291650ba1e2951aef07f
    RichPEHeaderHash SHA13cb0d2f0d1a2046caf0027cfd995294a09eeda72
    RichPEHeaderHash SHA2563089fe7fa4527043c200fafe2a7272e48a1f7c54725a623f22d12f2cdbb48350
    CompanyMicrosoft Corporation
    DescriptionBoot Manager
    ProductMicrosoft® Windows® Operating System
    OriginalFilenamebootmgr.exe

    Certificates

    Expand
    Certificate 330000004ea1d80770a9bbe94400000000004e
    FieldValue
    ToBeSigned (TBS) MD59da610547a25cbe89af7ecdb99229623
    ToBeSigned (TBS) SHA16841cbcbd019586d045c2e9d6d0bc3a98fee3bf7
    ToBeSigned (TBS) SHA2561cfead8146399a4dfe6759e9303c30c521cff3830e7177e87e64021dc3da4931
    SubjectC=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Windows
    ValidFrom2014-07-01 20:32:01
    ValidTo2015-10-01 20:32:01
    Signature8207b0c79e3b96e7317cd1aac9ab45fb52f1a2c847cda4bed6ff0b366566c6046976257890a79270765662a04b0f6d958c1fbba688b7717f77e10137107f8ccde9ce066d0c99e9fabfa3d669e2eac822a81d86f620828a018738e290f15370886c689af9399fad45f38e2e0fd6e31fcdf1b295ddc015164e757e2c630b05d1c103735e452ea9e3ca1b44e776277a030aa473094499bdfad51ebcdc61c8694148123c150811230bab24f1fb3ca64f018ac37d5cbb61173055b20dd07fbf8955909696be8de608979541932fd0257f932db6f6975b4bc82bd393a432a4ef01d88fc9652cc0d4eede46df519df8488353bfbf4dbc8358efc8dc3215c5538ebbd03e
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityFalse
    SerialNumber330000004ea1d80770a9bbe94400000000004e
    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

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    ExportedFunctions

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    Signature

    Expand
    {
  "Certificates": [
    {
      "IsCertificateAuthority": false,
      "SerialNumber": "330000004ea1d80770a9bbe94400000000004e",
      "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",
      "TBS": {
        "MD5": "9da610547a25cbe89af7ecdb99229623",
        "SHA1": "6841cbcbd019586d045c2e9d6d0bc3a98fee3bf7",
        "SHA256": "1cfead8146399a4dfe6759e9303c30c521cff3830e7177e87e64021dc3da4931"
      },
      "ValidFrom": "2014-07-01 20:32:01",
      "ValidTo": "2015-10-01 20:32:01",
      "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": "330000004ea1d80770a9bbe94400000000004e",
      "Version": 1
    }
  ],
  "SignerInfo": ""
}

    source

    last_updated: 2023-08-31