b42db55a-4520-493a-81ec-42002887ea96

bootmgfw.efi :inline

Description

This was provided by Microsoft and revoked May-23

  • UUID: b42db55a-4520-493a-81ec-42002887ea96
  • 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
Persistence32-bit

Detections

YARA 🏹

Expand

Exact Match

with header and size limitation

Threat Hunting

without header and size limitation

Renamed

for renamed bootloader files

Sigma 🛡️

Expand

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
    MD57f0de7a661590f1c33de0b80676e8827
    SHA1003454b835a5ee7ee200f9cb4e68b071e2b8e69b
    SHA256d1af02fca7522c8d27e053544b3b653ff2daffcae9c420e460235dacab53f7cd
    Authentihash MD5caa781731a9d13ac418d97ec2cccb8f1
    Authentihash SHA17ac2da2861fe7b90862a27b63629d8a9ee58d97d
    Authentihash SHA2567fddfe06c44dc4302da54577353c18fdbe11b41cb3e6064ec1c116ee102fe080
    RichPEHeaderHash MD5a387b0075e977009a7bb74d24fc388de
    RichPEHeaderHash SHA1345e019b25904c911be9e3b6a9e2b0bb18652b04
    RichPEHeaderHash SHA256e04ed5674c66abbab401efb6e21e2481d4cbc485e5c8a6d34419bd7c8cc9fdad
    CompanyMicrosoft Corporation
    DescriptionBoot Manager
    ProductMicrosoft® Windows® Operating System
    OriginalFilenamebootmgr.exe

    Certificates

    Expand
    Certificate 33000000bce120fdd27cc8ee930000000000bc
    FieldValue
    ToBeSigned (TBS) MD5f31f8c784e5d3986ccacb9c88c6d7044
    ToBeSigned (TBS) SHA1833498af9a41da339c83e0d384b521f72d053331
    ToBeSigned (TBS) SHA2561f47e616b2810165968d76ef4f6587611c276f4b52901bd6aa5822f9c6e52976
    SubjectC=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Windows
    ValidFrom2015-08-18 17:15:28
    ValidTo2016-11-18 17:15:28
    Signature60743a2c8b9d1d20759fd327472b3fb9c434cf9df5a4501199cafd1d0f6806659be78f5346fcdedead6c2615214f653b0306302508cc80e386fb54dc8d0b8c63131e54f259c4f8792335187e2d4f649a82490807f129590c1a5c76d8c56a12e51f4c9bb20f35bb27b3ddc0dfbd849e506ed390bef27d160c5fa33291231b73cffddf7bcc42948b509b88242d401ab88f4283997bb6707c2fd2facf67e2639b5b02da8975568de56dc96eee8061c69bc552d61a0fa49ea527563681fb35f68dde6eee372b99f69761de0eac9b72b1510f80e66f6560bf1d0669dcbdd915ffe13454502833fe26932c018ad8399ad2840a93b0c222b7900151dc9ddb4475e1d7b7
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityFalse
    SerialNumber33000000bce120fdd27cc8ee930000000000bc
    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

    Expand

    ImportedFunctions

    Expand

    ExportedFunctions

    Expand

    Signature

    Expand
    {
  "Certificates": [
    {
      "IsCertificateAuthority": false,
      "SerialNumber": "33000000bce120fdd27cc8ee930000000000bc",
      "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": "f31f8c784e5d3986ccacb9c88c6d7044",
        "SHA1": "833498af9a41da339c83e0d384b521f72d053331",
        "SHA256": "1f47e616b2810165968d76ef4f6587611c276f4b52901bd6aa5822f9c6e52976"
      },
      "ValidFrom": "2015-08-18 17:15:28",
      "ValidTo": "2016-11-18 17:15:28",
      "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": "33000000bce120fdd27cc8ee930000000000bc",
      "Version": 1
    }
  ],
  "SignerInfo": ""
}

    source

    last_updated: 2023-08-31