635f3ff1-ab0a-468c-b6a3-6a8aa39301d5

bootmgfw.efi :inline

Description

This was provided by Microsoft and revoked May-23

  • UUID: 635f3ff1-ab0a-468c-b6a3-6a8aa39301d5
  • 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
    MD583e596b8944ed413e5bbc0c51c0b64c6
    SHA1fab234f84e488343ea0f65072d8785217cabef40
    SHA256165a5dcdea3a7de7cfae38298597445eba59282308c7243be50f568aa610f4f2
    Authentihash MD5576bde13122eaba63fa0734baecf5a48
    Authentihash SHA1cf7b3cc939f51462213b3b05b81fbc42ee05afd8
    Authentihash SHA256e2cf881cf07195454505047d74810ed79ae20dfd0f1593afbbf08270a486c038
    RichPEHeaderHash MD595c181375ef93e118f930024df1bff96
    RichPEHeaderHash SHA1e3a24ad3c9b07df2a4fb39a1432ba3597faa48f7
    RichPEHeaderHash SHA2560708c72d17d4892e2deab31b567c830ee261f5e5730997a47366c0e1e58dec0e
    CompanyMicrosoft Corporation
    DescriptionBoot Manager
    ProductMicrosoft® Windows® Operating System
    OriginalFilenamebootmgr.exe

    Certificates

    Expand
    Certificate 33000001066ec325c431c9180e000000000106
    FieldValue
    ToBeSigned (TBS) MD5dde4566ad877cdd7257537c5a15caff8
    ToBeSigned (TBS) SHA161ccf092df4eb7534ffc8df983b362e10eb895c2
    ToBeSigned (TBS) SHA2560ae3a29cfb54cd16c853b2246cc428219bb87f7e4ea299b0374b2ac43f2a61d8
    SubjectC=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Windows
    ValidFrom2016-10-11 20:39:31
    ValidTo2018-01-11 20:39:31
    Signaturebd80b589ac202a8c57028b505da374963d49e555f4d7fba7ec9c9b645e2c3cc1b869ca054fce40a3953a4cae404cf07bc8f52e9408afa7cf74f03c131aa37e26eea21fe524bc06fe6bf59c1d510cc505cae5e385344eb27a4500ac119b30d5a54c5ae9c249665539cbf51fb8680a5311ee884d3d4a2c38a8e6e170f7c9f94aa821f889f4ef7733ca24c6ecc56105ec5b39f8609dc897a2e7deca1c32d696208e8b92a92419b386e3714c104f01a54b619de5afb79db9618e7f90852b33228d4ae67d6e74b3c55ad9f6f41b86952aed4d73efe4e09f36d2ce97679ce82ca30d073a1dc401342b1b255abaa86b506d8344fa287e2a1214e2d3b98dfdb9c6d85fda
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityFalse
    SerialNumber33000001066ec325c431c9180e000000000106
    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

    Expand

    Signature

    Expand
    {
  "Certificates": [
    {
      "IsCertificateAuthority": false,
      "SerialNumber": "33000001066ec325c431c9180e000000000106",
      "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": "dde4566ad877cdd7257537c5a15caff8",
        "SHA1": "61ccf092df4eb7534ffc8df983b362e10eb895c2",
        "SHA256": "0ae3a29cfb54cd16c853b2246cc428219bb87f7e4ea299b0374b2ac43f2a61d8"
      },
      "ValidFrom": "2016-10-11 20:39:31",
      "ValidTo": "2018-01-11 20:39:31",
      "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": "33000001066ec325c431c9180e000000000106",
      "Version": 1
    }
  ],
  "SignerInfo": ""
}

    source

    last_updated: 2023-08-31