5261cacf-380c-4573-85ff-a643cbdf009a

KApcHelper_x64.sys :inline :inline

Description

Vulnerable driving using the stolen Nvidia Certificate.

  • UUID: 5261cacf-380c-4573-85ff-a643cbdf009a
  • Created: 2023-05-06
  • Author: Guus Verbeek
  • Acknowledgement: |

DownloadBlock

This download link contains the malicious driver!

Commands

sc.exe create KApcHelper_x64.sys binPath=C:\windows\temp\KApcHelper_x64.sys type=kernel && sc.exe start KApcHelper_x64.sys
Use CasePrivilegesOperating System
Elevate privilegeskernelWindows 10

Detections

YARA 🏹

Expand

Exact Match

with header and size limitation

Threat Hunting

without header and size limitation

Sigma 🛡️

Expand

Names

detects loading using name only

Hashes

detects loading using hashes only

Sysmon 🔎

Expand

Block

on hashes

Alert

on hashes

Resources


  • https://www.mandiant.com/resources/blog/hunting-attestation-signed-malware

    • Known Vulnerable Samples

    PropertyValue
    FilenameKApcHelper_x64.sys
    Creation Timestamp2022-06-06 09:14:46
    MD50f16a43f7989034641fd2de3eb268bf1
    SHA1cc65bf60600b64feece5575f21ab89e03a728332
    SHA256d7c81b0f3c14844f6424e8bdd31a128e773cb96cccef6d05cbff473f0ccb9f9c
    Authentihash MD5adb7de0467bd3f92fce34819ec656658
    Authentihash SHA12c1bc3f623fd9bfdf2ecbe5403da1849c85b8433
    Authentihash SHA2562a30ad675142cf411e7e5f5c53c6423de570a398295b0956130a7a7d77383103
    RichPEHeaderHash MD55080c1caf53ea61b5b919bbcaf0c8354
    RichPEHeaderHash SHA16fbbf5ebe27354688ae61f0d43226c8f7326bfec
    RichPEHeaderHash SHA2565cc392362f3b91dc626f688e374e0da1866120dcc396fe403a5d8b561cc18943

    Download

    Certificates

    Expand
    Certificate 43bb437d609866286dd839e1d00309f5
    FieldValue
    ToBeSigned (TBS) MD5cef292b5c6cdb07e480ccbba0c9d56d1
    ToBeSigned (TBS) SHA115c37dbebe6fcc77108e3d7ad982676d3d5e77f7
    ToBeSigned (TBS) SHA2563cb152375fa9e694fd2f9167c382005166871c783774997df1a42e0b6013d82a
    SubjectC=US, ST=California, L=Santa Clara, O=NVIDIA Corporation, OU=Digital ID Class 3 , Microsoft Software Validation v2, OU=Software, CN=NVIDIA Corporation
    ValidFrom2011-09-02 00:00:00
    ValidTo2014-09-01 23:59:59
    Signature5238793a97b2868da546597dbe0a1fba197ae635b9f53b53e26758194d749767e05fb1ce407fd31469376b37c67d5d48bc834f970ac733cd63d557e8a3be20a1fbf9d09e7a5c6c4ebd6fc18a68d0842d2ffdf6f79142d914c6521d227014040fa12f2afb3878aa065cfbed7fa29091b4fe54ea6237a0e1f8f183d0573ebb5bfe712cee4c49bd0b2f40c33bfcf0c7de0bc51ce01a70d14072d4d01216f36e388159220a4d8e3250ddccd71c7ef8a93a26edda2e959b598703a85fa391630e052454e31390dd82d69afee5df2f287bdce8f45f6363c27e6e23ab92faefc7e8d78c10cc1f936f33c36a134cb8820b5749ff479f70834bd99d8e15ad79a1cb3d7ebf
    SignatureAlgorithmOID1.2.840.113549.1.1.5
    IsCertificateAuthorityFalse
    SerialNumber43bb437d609866286dd839e1d00309f5
    Version3
    Certificate 611993e400000000001c
    FieldValue
    ToBeSigned (TBS) MD578a717e082dcc1cda3458d917e677d14
    ToBeSigned (TBS) SHA14a872e0e51f9b304469cd1dedb496ee9b8b983a4
    ToBeSigned (TBS) SHA256317fa1d234ebc49040ebc5e8746f8997471496051b185a91bdd9dfbb23fab5f8
    SubjectC=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=(c) 2006 VeriSign, Inc. , For authorized use only, CN=VeriSign Class 3 Public Primary Certification Authority , G5
    ValidFrom2011-02-22 19:25:17
    ValidTo2021-02-22 19:35:17
    Signature812a82168c34672be503eb347b8ca2a3508af45586f11e8c8eae7dee0319ce72951848ad6211fd20fd3f4706015ae2e06f8c152c4e3c6a506c0b36a3cf7a0d9c42bc5cf819d560e369e6e22341678c6883762b8f93a32ab57fbe59fba9c9b2268fcaa2f3821b983e919527978661ee5b5d076bcd86a8e26580a8e215e2b2be23056aba0cf347934daca48c077939c061123a050d89a3ec9f578984fbecca7c47661491d8b60f195de6b84aacbc47c8714396e63220a5dc7786fd3ce38b71db7b9b03fcb71d3264eb1652a043a3fa2ead59924e7cc7f233424838513a7c38c71b242228401e1a461f17db18f7f027356cb863d9cdb9645d2ba55eefc629b4f2c7f821cc04ba57fd01b6abc667f9e7d3997ff4f522fa72f5fdff3a1c423aa1f98018a5ee8d1cd4669e4501feaaeefffb178f30f7f1cd29c59decb5d549003d85b8cbbb933a276a49c030ae66c9f723283276f9a48356c848ce5a96aaa0cc0cc47fb48e97af6de35427c39f86c0d6e473089705dbd054625e0348c2d59f7fa7668cd09db04fd4d3985f4b7ac97fb22952d01280c70f54b61e67cdc6a06c110384d34875e72afeb03b6e0a3aa66b769905a3f177686133144706fc537f52bd92145c4a246a678caf8d90aad0f679211b93267cc3ce1ebd883892ae45c6196a4950b305f8ae59378a6a250394b1598150e8ba8380b72335f476b9671d5918ad208d94
    SignatureAlgorithmOID1.2.840.113549.1.1.5
    IsCertificateAuthorityTrue
    SerialNumber611993e400000000001c
    Version3
    Certificate 5200e5aa2556fc1a86ed96c9d44b33c7
    FieldValue
    ToBeSigned (TBS) MD5b30c31a572b0409383ed3fbe17e56e81
    ToBeSigned (TBS) SHA14843a82ed3b1f2bfbee9671960e1940c942f688d
    ToBeSigned (TBS) SHA25603cda47a6e654ed85d932714fc09ce4874600eda29ec6628cfbaeb155cab78c9
    SubjectC=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=Terms of use at https://www.verisign.com/rpa (c)10, CN=VeriSign Class 3 Code Signing 2010 CA
    ValidFrom2010-02-08 00:00:00
    ValidTo2020-02-07 23:59:59
    Signature5622e634a4c461cb48b901ad56a8640fd98c91c4bbcc0ce5ad7aa0227fdf47384a2d6cd17f711a7cec70a9b1f04fe40f0c53fa155efe749849248581261c911447b04c638cbba134d4c645e80d85267303d0a98c646ddc7192e645056015595139fc58146bfed4a4ed796b080c4172e737220609be23e93f449a1ee9619dccb1905cfc3dd28dac423d6536d4b43d40288f9b10cf2326cc4b20cb901f5d8c4c34ca3cd8e537d66fa520bd34eb26d9ae0de7c59af7a1b42191336f86e858bb257c740e58fe751b633fce317c9b8f1b969ec55376845b9cad91faaced93ba5dc82153c2825363af120d5087111b3d5452968a2c9c3d921a089a052ec793a54891d3
    SignatureAlgorithmOID1.2.840.113549.1.1.5
    IsCertificateAuthorityTrue
    SerialNumber5200e5aa2556fc1a86ed96c9d44b33c7
    Version3

    Imports

    Expand
    • ntoskrnl.exe

    Imported Functions

    Expand
    • rand
    • srand
    • wcsstr
    • RtlInitUnicodeString
    • RtlGetVersion
    • KeDelayExecutionThread
    • ExAllocatePoolWithTag
    • ExFreePoolWithTag
    • ExSystemTimeToLocalTime
    • MmGetSystemRoutineAddress
    • IofCompleteRequest
    • IoCreateDevice
    • IoCreateSymbolicLink
    • IoDeleteDevice
    • IoGetCurrentProcess
    • ObReferenceObjectByHandleWithTag
    • ObfDereferenceObject
    • ObfDereferenceObjectWithTag
    • MmIsAddressValid
    • PsGetProcessExitStatus
    • PsIsThreadTerminating
    • PsLookupProcessByProcessId
    • PsLookupThreadByThreadId
    • PsGetThreadProcess
    • PsIsSystemThread
    • ObOpenObjectByPointerWithTag
    • KeBugCheckEx

    Exported Functions

    Expand

    Sections

    Expand
    • .text
    • .rdata
    • .data
    • .pdata
    • INIT
    • .reloc

    Signature

    Expand
    {
  "Certificates": [
    {
      "IsCertificateAuthority": false,
      "SerialNumber": "43bb437d609866286dd839e1d00309f5",
      "Signature": "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",
      "SignatureAlgorithmOID": "1.2.840.113549.1.1.5",
      "Subject": "C=US, ST=California, L=Santa Clara, O=NVIDIA Corporation, OU=Digital ID Class 3 , Microsoft Software Validation v2, OU=Software, CN=NVIDIA Corporation",
      "TBS": {
        "MD5": "cef292b5c6cdb07e480ccbba0c9d56d1",
        "SHA1": "15c37dbebe6fcc77108e3d7ad982676d3d5e77f7",
        "SHA256": "3cb152375fa9e694fd2f9167c382005166871c783774997df1a42e0b6013d82a",
        "SHA384": "e64427dea71a71110ebc317f3552cd7193c5743f72d5cac9257abe80346d15ee42930d5a85e16c02ea06f56c7e8811fb"
      },
      "ValidFrom": "2011-09-02 00:00:00",
      "ValidTo": "2014-09-01 23:59:59",
      "Version": 3
    },
    {
      "IsCertificateAuthority": true,
      "SerialNumber": "611993e400000000001c",
      "Signature": "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",
      "SignatureAlgorithmOID": "1.2.840.113549.1.1.5",
      "Subject": "C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=(c) 2006 VeriSign, Inc. , For authorized use only, CN=VeriSign Class 3 Public Primary Certification Authority , G5",
      "TBS": {
        "MD5": "78a717e082dcc1cda3458d917e677d14",
        "SHA1": "4a872e0e51f9b304469cd1dedb496ee9b8b983a4",
        "SHA256": "317fa1d234ebc49040ebc5e8746f8997471496051b185a91bdd9dfbb23fab5f8",
        "SHA384": "b71052da4eb9157c8c1a5d7f55df19d69b9128598b72fcca608e5b7cc7d64c43c5504b9c86355a6dc22ee40c88cc385c"
      },
      "ValidFrom": "2011-02-22 19:25:17",
      "ValidTo": "2021-02-22 19:35:17",
      "Version": 3
    },
    {
      "IsCertificateAuthority": true,
      "SerialNumber": "5200e5aa2556fc1a86ed96c9d44b33c7",
      "Signature": "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",
      "SignatureAlgorithmOID": "1.2.840.113549.1.1.5",
      "Subject": "C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=Terms of use at https://www.verisign.com/rpa (c)10, CN=VeriSign Class 3 Code Signing 2010 CA",
      "TBS": {
        "MD5": "b30c31a572b0409383ed3fbe17e56e81",
        "SHA1": "4843a82ed3b1f2bfbee9671960e1940c942f688d",
        "SHA256": "03cda47a6e654ed85d932714fc09ce4874600eda29ec6628cfbaeb155cab78c9",
        "SHA384": "bbda8407c4f9fc4e54d772f1c7fb9d30bc97e1f97ecd51c443063d1fa0644e266328781776cd5c44896c457c75f4d7da"
      },
      "ValidFrom": "2010-02-08 00:00:00",
      "ValidTo": "2020-02-07 23:59:59",
      "Version": 3
    }
  ],
  "CertificatesInfo": "",
  "Signer": [
    {
      "Issuer": "C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=Terms of use at https://www.verisign.com/rpa (c)10, CN=VeriSign Class 3 Code Signing 2010 CA",
      "SerialNumber": "43bb437d609866286dd839e1d00309f5",
      "Version": 1
    }
  ],
  "SignerInfo": ""
}

    source

    last_updated: 2024-09-26