a4795ab6-d908-44cf-9ebf-a47db367d385

WiRwaDrv.sys :inline

Description

The Carbon Black Threat Analysis Unit (TAU) discovered 34 unique vulnerable drivers (237 file hashes) accepting firmware access. Six allow kernel memory access. All give full control of the devices to non-admin users. By exploiting the vulnerable drivers, an attacker without the system privilege may erase/alter firmware, and/or elevate privileges. As of the time of writing in October 2023, the filenames of the vulnerable drivers have not been made public until now.

  • UUID: a4795ab6-d908-44cf-9ebf-a47db367d385
  • Created: 2023-11-02
  • Author: Takahiro Haruyama
  • Acknowledgement: |

Download

This download link contains the vulnerable driver!

Commands

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

Detections

YARA 🏹

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Exact Match

with header and size limitation

Threat Hunting

without header and size limitation

Renamed

for renamed driver 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://blogs.vmware.com/security/2023/10/hunting-vulnerable-kernel-drivers.html

  • Known Vulnerable Samples

    PropertyValue
    Filename
    Creation Timestamp2019-10-18 02:40:37
    MD57be3a7a743f2013c3e90355219626c2c
    SHA1a951953e3c1bb08653ed7b0daec38be7b0169c27
    SHA256d8fc8e3a1348393c5d7c3a84bcbae383d85a4721a751ad7afac5428e5e579b4e
    Authentihash MD5b27ddf036b235b1a2a0f9c3869cf12e5
    Authentihash SHA1d6540f9784c51a4bf08b59e7398de5bacb4e9011
    Authentihash SHA256c7e5bd0090962b4f31e17ab3d1f97bd9870d23238b591a70e27a0c91db138f95
    RichPEHeaderHash MD5c5599f502c132e4cd94d522a8cadd663
    RichPEHeaderHash SHA1d726b26c064ab532c55824107f0340b8b618b35e
    RichPEHeaderHash SHA2565927d293c65d42091d25a0554140352e17a69c69953e583671bc6fad80728249
    CompanyWistron Corporation
    DescriptionWistron RWA Driver
    ProductWistron RWA Driver
    OriginalFilenameWiRwaDrv.sys

    Download

    Certificates

    Expand
    Certificate 191a32cb759c97b8cfac118dd5127f49
    FieldValue
    ToBeSigned (TBS) MD5788b61bd26da89253179e3de2cdb527f
    ToBeSigned (TBS) SHA17d06f16e7bf21bce4f71c2cb7a3e74351451bf69
    ToBeSigned (TBS) SHA256b3c925b4048c3f7c444d248a2b101186b57cba39596eb5dce0e17a4ee4b32f19
    SubjectC=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 Extended Validation Code Signing CA , G2
    ValidFrom2014-03-04 00:00:00
    ValidTo2024-03-03 23:59:59
    Signature3f5b19f3fa13d575382a5aee9f5aa04ca91dc5cc94eede15fef5106ea41ba56483541858c40b28a185c34e74e5ff897cfed5ed3cba719f5602268f162a88feb0a32722ce4be2388e00a63a865f9de53ea8de644941744121fd07c88417da1d653082cb264f39d60427a481b14b49c3238b7e02321827b7ab0bf31872b6a4ee67066f38a6588de0f17e5da460c6a8e5505fe0e8bae28f9958b6b5a0a876f1a2f11c8841727e52979b0a36998d50f701eb3ce7f0226ae5358c63368a1ab1d967665f971aefa8209df02fba6cced9948500f158f17dc97c22b5075d02c6e60bbfab9393ff27188e33367e5734f1c3af04c184f156b3e8878336f8d30a31dc6e2c6d
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityTrue
    SerialNumber191a32cb759c97b8cfac118dd5127f49
    Version3
    Certificate 3fab6983c8188ce80d06ddd6b92ef292
    FieldValue
    ToBeSigned (TBS) MD505bc106762d78fe49ebb5136aba4f0ed
    ToBeSigned (TBS) SHA1a5f824c6cb64fad75d9adcb6e1bb85eafd6bfb40
    ToBeSigned (TBS) SHA25604b2175a32b3b2aa1c4523f6e6668c5ae4081ce76175f6cfe2a0fff19481b987
    Subject??=TW, ??=Taipei City, ??=Taipei City, ??=Private Organization, serialNumber=12868358, C=TW, L=Taipei City, O=Wistron Corporation, CN=Wistron Corporation
    ValidFrom2019-07-10 00:00:00
    ValidTo2021-04-10 23:59:59
    Signature26664b896d1e83b2fa44d95a88188d6a2afec9f4b0495a9b719dc107cbc8ed0efd4c65c8d6a36101ab32caba91f92d7d9402a6b6db782ecd9cea5849917e349b39d7d528045c701abb7072af2dfd526b4756733f4ed5f31e1c84ace251e39a0661493af6de24dba761a94915ced95b4d8421b5167bc9e85318021116959d9f2fe98b674d0d24f01929d50699b151b9cdb8464dfbdc578e725f6a7af29d0e8970f82531130b31fc5874650d637b359ac33a00b64b10bc8fae20adf2ade12764de5902023f8bb7782c8b5c72acf2bdced5727197f9e9d519fccaa7c397ae149da1702cda9d644f654f38044e04f637728f8228391bbe645f87977ca170f1e6cb4f
    SignatureAlgorithmOID1.2.840.113549.1.1.11
    IsCertificateAuthorityFalse
    SerialNumber3fab6983c8188ce80d06ddd6b92ef292
    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

    Imports

    Expand
    • ntoskrnl.exe
    • HAL.dll

    Imported Functions

    Expand
    • MmMapIoSpace
    • MmUnmapIoSpace
    • IofCompleteRequest
    • DbgPrint
    • IoCreateSymbolicLink
    • IoDeleteDevice
    • IoDeleteSymbolicLink
    • IoIs32bitProcess
    • IoCreateDevice
    • RtlInitUnicodeString
    • KeStallExecutionProcessor

    Exported Functions

    Expand

    Sections

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

    Signature

    Expand
    {
      "Certificates": [
        {
          "IsCertificateAuthority": true,
          "SerialNumber": "191a32cb759c97b8cfac118dd5127f49",
          "Signature": "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",
          "SignatureAlgorithmOID": "1.2.840.113549.1.1.11",
          "Subject": "C=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 Extended Validation Code Signing CA , G2",
          "TBS": {
            "MD5": "788b61bd26da89253179e3de2cdb527f",
            "SHA1": "7d06f16e7bf21bce4f71c2cb7a3e74351451bf69",
            "SHA256": "b3c925b4048c3f7c444d248a2b101186b57cba39596eb5dce0e17a4ee4b32f19",
            "SHA384": "2955e28cb7ec0ea9730b499a0f189f9621eceb02591a9486b583f12bb845885a30d6a871826318a167cc5f06b274e58c"
          },
          "ValidFrom": "2014-03-04 00:00:00",
          "ValidTo": "2024-03-03 23:59:59",
          "Version": 3
        },
        {
          "IsCertificateAuthority": false,
          "SerialNumber": "3fab6983c8188ce80d06ddd6b92ef292",
          "Signature": "26664b896d1e83b2fa44d95a88188d6a2afec9f4b0495a9b719dc107cbc8ed0efd4c65c8d6a36101ab32caba91f92d7d9402a6b6db782ecd9cea5849917e349b39d7d528045c701abb7072af2dfd526b4756733f4ed5f31e1c84ace251e39a0661493af6de24dba761a94915ced95b4d8421b5167bc9e85318021116959d9f2fe98b674d0d24f01929d50699b151b9cdb8464dfbdc578e725f6a7af29d0e8970f82531130b31fc5874650d637b359ac33a00b64b10bc8fae20adf2ade12764de5902023f8bb7782c8b5c72acf2bdced5727197f9e9d519fccaa7c397ae149da1702cda9d644f654f38044e04f637728f8228391bbe645f87977ca170f1e6cb4f",
          "SignatureAlgorithmOID": "1.2.840.113549.1.1.11",
          "Subject": "??=TW, ??=Taipei City, ??=Taipei City, ??=Private Organization, serialNumber=12868358, C=TW, L=Taipei City, O=Wistron Corporation, CN=Wistron Corporation",
          "TBS": {
            "MD5": "05bc106762d78fe49ebb5136aba4f0ed",
            "SHA1": "a5f824c6cb64fad75d9adcb6e1bb85eafd6bfb40",
            "SHA256": "04b2175a32b3b2aa1c4523f6e6668c5ae4081ce76175f6cfe2a0fff19481b987",
            "SHA384": "07a7d53cee7840bc277f18fc445986b9d951c577a3ab46a6a985ac21e15705e9c1556a19de3993c3af13724e5e9a5d49"
          },
          "ValidFrom": "2019-07-10 00:00:00",
          "ValidTo": "2021-04-10 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
        }
      ],
      "CertificatesInfo": "",
      "Signer": [
        {
          "Issuer": "C=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 Extended Validation Code Signing CA , G2",
          "SerialNumber": "3fab6983c8188ce80d06ddd6b92ef292",
          "Version": 1
        }
      ],
      "SignerInfo": ""
    }
    

    source

    last_updated: 2023-12-22