c8d926b0-b5a4-4960-b951-1f4cfffd940e

bootmgfw.efi :inline

Description

This was provided by Microsoft and revoked May-23

  • UUID: c8d926b0-b5a4-4960-b951-1f4cfffd940e
  • 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 ARM

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
    MD509287aecf07aa294ed7f76f2234270a9
    SHA1f4de49ab09ad1d3e18ba4eeef481d91cd67a4860
    SHA256860c16809e3941bebedff0bde99c32aa77379c0be1f6b174d20038a02162d3d5
    Authentihash MD52493adfef4cb684c76b9697cf414c95b
    Authentihash SHA1d05a293ae6ba3f9d4f03da5027807f2182be4c22
    Authentihash SHA256ee0a54e2dd9848d7a209d2c945449a0bac9a46c45e5e033c6982d2924839ac74
    RichPEHeaderHash MD59a33833e2407d8d25146f07e9c5c8444
    RichPEHeaderHash SHA104243895d74611d8d91937ec718a82b8dd7fe0f9
    RichPEHeaderHash SHA2562efb0d9096d6fc172537ba8c386ba82f72b5a9bed5047e7830290bb6aafb0ff4
    CompanyMicrosoft Corporation
    DescriptionBoot Manager
    ProductMicrosoft® Windows® Operating System
    OriginalFilenamebootmgr.exe

    Certificates

    Expand
    Certificate 33000000a6206efff45e063a190000000000a6
    FieldValue
    ToBeSigned (TBS) MD557c30a2d7e6573994b137079cbff34b8
    ToBeSigned (TBS) SHA108980baa201ccbfc096accff568fb2b073da66f4
    ToBeSigned (TBS) SHA25619241716f05046843df5ff3c02395bf6e2ed68ad52d441a71a2edcd24ac93056
    SubjectC=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=Microsoft Windows
    ValidFrom2015-07-15 17:04:59
    ValidTo2016-10-15 17:04:59
    Signature1af26ac0cce3928cceeb0ebeb5186b1b289be1caa47cba55a0f5e23afa820ee56142a1f158d8d32c2230c6010fa04ae06caf71b10094107e15e2a73e7d6ab6ee827ab9a2dd386dfe2693fcf0e1a88ac736f48f2944a8214bda510dfc68ccbf0fc6c4f0f39036edd3f08e1449b129d7f611b7e5d6b60a97f63530ed8381a11fc8b95beb7fbc45258d4eb767a911095a27d17f613665f70600b30b88091015722e8a64fb43d975f92890d80b545e38317279e44a7071a104715796dd91d0b913c2ec106073f696a236d71979da345d469eac38e7492ac88f7ecdff68180d2dd57051d79a46b2f6ed2c810d6bd51521c3fda183dd8599f282561255ef8bde0f8ed8
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityFalse
    SerialNumber33000000a6206efff45e063a190000000000a6
    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": "33000000a6206efff45e063a190000000000a6",
      "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": "57c30a2d7e6573994b137079cbff34b8",
        "SHA1": "08980baa201ccbfc096accff568fb2b073da66f4",
        "SHA256": "19241716f05046843df5ff3c02395bf6e2ed68ad52d441a71a2edcd24ac93056"
      },
      "ValidFrom": "2015-07-15 17:04:59",
      "ValidTo": "2016-10-15 17:04:59",
      "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": "33000000a6206efff45e063a190000000000a6",
      "Version": 1
    }
  ],
  "SignerInfo": ""
}

    source

    last_updated: 2023-08-31