750a8aa9-a87c-4142-b96b-18ea139ada14

driver_89036534.sys :inline :inline

Description

Sophos, from time to time, has observed a threat actor deploy variants of Poortry on different machines within a single estate during an attack. These variants contain the same payload, but signed with a different certificate than the driver first seen used during the attack.

  • UUID: 750a8aa9-a87c-4142-b96b-18ea139ada14
  • Created: 2024-09-10
  • Author: Michael Haag
  • Acknowledgement: |

DownloadBlock

This download link contains the malicious driver!

Commands

sc.exe create driver_ef9d653a.sys binPath=C:\windows\temp\driver_ef9d653a.sys type=kernel && sc.exe start driver_ef9d653a.sys
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

Sigma 🛡️

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Names

detects loading using name only

Hashes

detects loading using hashes only

Sysmon 🔎

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Block

on hashes

Alert

on hashes

Resources


  • https://news.sophos.com/en-us/2024/08/27/burnt-cigar-2/

    • Known Vulnerable Samples

    PropertyValue
    Filename
    Creation Timestamp2023-04-10 20:51:04
    MD5f157ac999b29ac010862177c1c66cee7
    SHA1905c66938437218b27dccb4d54b1222cf7a313c8
    SHA25689036534a3da657882da96d9f211ae41efab4083bd6dbedbeaa2516d1d04cff4
    Authentihash MD534687c5f0f1d81135ed5b86a4d7a07b7
    Authentihash SHA1f329cd844706772c18f52b6a0f8a3b02ac84d0bd
    Authentihash SHA2561df739ca8e7763776f84b421c7859fccb2fbfd47cf27f9980f646597f5ae7836
    RichPEHeaderHash MD5521da07ffe2d4e1455d75a6dd9e53fe3
    RichPEHeaderHash SHA10f7b395c48895f7834bc792d2fcc657109dbfbf7
    RichPEHeaderHash SHA2569057d9b3f2ad1d9e18f98859e64334b39731b018867e3616729455f45b6e4a8d

    Download

    Certificates

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    Certificate 54871d9ab38d1902c32115f4c0797ea2
    FieldValue
    ToBeSigned (TBS) MD5dd510df4937ec27c5fbf94479a760ec6
    ToBeSigned (TBS) SHA16e71e6434bc88648002a4a8893c21636154d5838
    ToBeSigned (TBS) SHA2566c463c728b91efb5d946fc14f47421ae0f56592ae2023cb6b39974bdc0254dd9
    SubjectC=CN, ST=Guangdong, L=Shenzhen, O=Shenzhen Jinxian Technology Co., Ltd., OU=Digital ID Class 3 , Microsoft Software Validation v2, CN=Shenzhen Jinxian Technology Co., Ltd.
    ValidFrom2014-01-07 00:00:00
    ValidTo2015-01-07 23:59:59
    Signaturea83acfce8a36b3e49c9c29e35f2a209c21de96894006710f6832f206d6585d9be1e14accf18f94ef8b533703a7b3ee89bd654eca9e685f68dc14460e8aa5574b3f27e640f4bcbd2797a055a35c8b2679ded85dfecc8258c050d5530b9279841ff7a7ba1a4fb07e85d9295889d7a363b2b2919f4553d8ee31ea7d2547be42a1e4e150dccdb4fb542e6e8796bb50f0844f7dfc8ad1f37b8c00c86772bae78c995188cec0c21b164b3930c26a834cf5e094f0822e39373cfca6a16791a7f40a7761b429d0298ff89b01b6482308c94a7813438cc094fd5727abdac44e14f2545e2872d59850703d21b727354cffc4762aa7d629af5e784957cab3890463857db34f
    SignatureAlgorithmOID1.2.840.113549.1.1.5
    IsCertificateAuthorityFalse
    SerialNumber54871d9ab38d1902c32115f4c0797ea2
    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
    • RtlInitUnicodeString
    • DbgPrintEx
    • ExAllocatePool
    • ExAllocatePoolWithTag
    • ExFreePoolWithTag
    • IoGetCurrentProcess
    • ObReferenceObjectByHandle
    • ObfDereferenceObject
    • ZwCreateFile
    • ZwQueryInformationFile
    • ZwReadFile
    • ZwClose
    • PsGetCurrentProcessId
    • NtClose
    • KeStackAttachProcess
    • KeUnstackDetachProcess
    • PsLookupProcessByProcessId
    • ZwAllocateVirtualMemory
    • ZwFlushBuffersFile
    • ZwGetNextThread
    • KeInitializeApc
    • KeInsertQueueApc
    • MmCopyVirtualMemory
    • __C_specific_handler
    • PsThreadType
    • IofCompleteRequest
    • DbgPrint
    • IoCreateDevice
    • IoCreateSymbolicLink
    • IoDeleteDevice
    • IoDeleteSymbolicLink
    • wcsstr
    • _wcsupr
    • RtlInitAnsiString
    • RtlAnsiStringToUnicodeString
    • RtlCompareUnicodeString
    • RtlFreeUnicodeString
    • MmIsAddressValid
    • PsGetProcessExitStatus
    • SeLocateProcessImageName
    • PsGetProcessPeb
    • PsGetProcessWow64Process
    • MmGetSystemRoutineAddress
    • MmGetPhysicalAddress
    • PsReferencePrimaryToken
    • ZwSetInformationProcess

    Exported Functions

    Expand

    Sections

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

    Signature

    Expand
    {
  "Certificates": [
    {
      "IsCertificateAuthority": false,
      "SerialNumber": "54871d9ab38d1902c32115f4c0797ea2",
      "Signature": "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",
      "SignatureAlgorithmOID": "1.2.840.113549.1.1.5",
      "Subject": "C=CN, ST=Guangdong, L=Shenzhen, O=Shenzhen Jinxian Technology Co., Ltd., OU=Digital ID Class 3 , Microsoft Software Validation v2, CN=Shenzhen Jinxian Technology Co., Ltd.",
      "TBS": {
        "MD5": "dd510df4937ec27c5fbf94479a760ec6",
        "SHA1": "6e71e6434bc88648002a4a8893c21636154d5838",
        "SHA256": "6c463c728b91efb5d946fc14f47421ae0f56592ae2023cb6b39974bdc0254dd9",
        "SHA384": "63fc57001363ef7c8a503c5578908351f32948144962d78172234fcea44acd5448b81fe3e34020d93e7de2bcb4a66c9a"
      },
      "ValidFrom": "2014-01-07 00:00:00",
      "ValidTo": "2015-01-07 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": "54871d9ab38d1902c32115f4c0797ea2",
      "Version": 1
    }
  ],
  "SignerInfo": ""
}

    source

    last_updated: 2025-01-29