Analysis

  • max time kernel
    150s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/01/2025, 12:09

General

  • Target
    JaffaCakes118_6c846c3f737167948ae219bcc5bf53c0.exe
  • Size 684KB
  • Sample250103-pbhqdawkbl
  • SHA256 d67bc9c954a176b1efd11a61abbb6c4f2ac9d6f1cd16e16246b15f5cef2b4851
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Expiro family
  • Expiro, m0yv

    Expiro aka m0yv is a multi-functional backdoor written in C++.

  • Expiro payload 1 IoCs
  • Disables taskbar notifications via registry modification
  • Executes dropped EXE 6 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Unsecured Credentials: Credentials In Files 1 TTPs

    Steal credentials from unsecured files.

  • Windows security modification 2 TTPs 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops Chrome extension 1 IoCs
  • Enumerates connected drives 3 TTPs 42 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in System32 directory 64 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 6 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 44 IoCs
  • Suspicious behavior: LoadsDriver 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6c846c3f737167948ae219bcc5bf53c0.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6c846c3f737167948ae219bcc5bf53c0.exe"
    1⤵
    • Drops Chrome extension
    • Enumerates connected drives
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:1092
  • C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe
    "C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe"
    1⤵
    • Executes dropped EXE
    • Windows security modification
    • Enumerates connected drives
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • System policy modification
    PID:1980
  • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\elevation_service.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\elevation_service.exe"
    1⤵
    • Executes dropped EXE
    PID:3984
  • C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
    "C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe"
    1⤵
    • Executes dropped EXE
    PID:1656
  • \??\c:\Program Files\Common Files\Microsoft Shared\Source Engine\OSE.EXE
    "c:\Program Files\Common Files\Microsoft Shared\Source Engine\OSE.EXE"
    1⤵
    • Executes dropped EXE
    PID:4004
  • C:\Windows\System32\OpenSSH\ssh-agent.exe
    C:\Windows\System32\OpenSSH\ssh-agent.exe
    1⤵
    • Executes dropped EXE
    PID:4972
  • C:\Windows\servicing\TrustedInstaller.exe
    C:\Windows\servicing\TrustedInstaller.exe
    1⤵
    • Executes dropped EXE
    • Drops file in Windows directory
    PID:408

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        elevation_service.exe

        • Path C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\elevation_service.exe
        • Size 2.1MB
        • SHA256 5c2cba6bc9c3e58dfc80bbc60730db6c5bc926b8e84fee42e2edf81eb48e37df
        • MD5 SHA1 SHA512 SSDEEP

        maintenanceservice.exe

        • Path C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
        • Size 781KB
        • SHA256 a09f5fa75d1a1aed22ec4abcbef5fa9572f9d7c9ab964a4cc082d6747824ed55
        • MD5 SHA1 SHA512 SSDEEP

        7z.exe

        • Path C:\Program Files\7-Zip\7z.exe
        • Size 1.1MB
        • SHA256 71da885b336e88b38037fb34080db980006e817d3421e88c9252030c8cdbebe3
        • MD5 SHA1 SHA512 SSDEEP

        7zFM.exe

        • Path C:\Program Files\7-Zip\7zFM.exe
        • Size 1.5MB
        • SHA256 f311845cc9eab86d4caf114bd586f4e0253f3e994c24a8e3988e0a6988b46017
        • MD5 SHA1 SHA512 SSDEEP

        7zG.exe

        • Path C:\Program Files\7-Zip\7zG.exe
        • Size 1.2MB
        • SHA256 af1f9f7edbefdb6e9469344ae800b1fc6830bc21076db8f30a1e863efd728017
        • MD5 SHA1 SHA512 SSDEEP

        AppVShNotify.exe

        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVShNotify.exe
        • Size 832KB
        • SHA256 7be5ba5c23669510627e0fd6ef8189a1a13d7d989ac1712f42f47eba54c6f01a
        • MD5 SHA1 SHA512 SSDEEP

        IntegratedOffice.exe

        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\IntegratedOffice.exe
        • Size 4.6MB
        • SHA256 1631a8f52d01a62adc8c3f59d0cc19f7ae1749b32f2661b06cb6efaded79a484
        • MD5 SHA1 SHA512 SSDEEP

        MavInject32.exe

        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\MavInject32.exe
        • Size 898KB
        • SHA256 1f45d6129da5b6a5ae49d3ec6cbc56b7022b82cf4dddb64208f9f9720720a6ac
        • MD5 SHA1 SHA512 SSDEEP

        OfficeC2RClient.exe

        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe
        • Size 24.0MB
        • SHA256 5044457983c503ff1d554fc79ee7b4c850b79ff4e224480bb68e52dbd5c3f382
        • MD5 SHA1 SHA512 SSDEEP

        appvcleaner.exe

        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\appvcleaner.exe
        • Size 2.7MB
        • SHA256 b17f093eb95a2ce5e0fbb6636d75b88290f71710a16ca0ca094b1396790febed
        • MD5 SHA1 SHA512 SSDEEP

        OSE.EXE

        • Path C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE
        • Size 797KB
        • SHA256 9e794db2e3394e129080761f9eae5a8a1fcac2e44fa8d93fec4bebe76b884034
        • MD5 SHA1 SHA512 SSDEEP

        cpkcoelj.tmp

        • Path C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\cpkcoelj.tmp
        • Size 4.6MB
        • SHA256 c7c90b7916fd04b5c9f176390fe9addacbd6b95dc76d395dc94027b25977fc53
        • MD5 SHA1 SHA512 SSDEEP

        elevation_service.exe

        • Path C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe
        • Size 2.1MB
        • SHA256 061808bf7781346d003e39f682f2de467f13afc803ccdea4b12984ae9953b155
        • MD5 SHA1 SHA512 SSDEEP

        iexplore.exe

        • Path C:\Program Files\Internet Explorer\iexplore.exe
        • Size 1.3MB
        • SHA256 71a2ed98fe4f23e80a890cb42b18694c8d7333172a8d0345246b929454f779fd
        • MD5 SHA1 SHA512 SSDEEP

        powershell.exe

        • Path C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        • Size 978KB
        • SHA256 058bcc39f8e7942761aaf19fe27ce1f75fec716a2e9011965ab048296423aca1
        • MD5 SHA1 SHA512 SSDEEP

        ssh-agent.exe

        • Path C:\Windows\System32\OpenSSH\ssh-agent.exe
        • Size 932KB
        • SHA256 9203218677644682c36342d334fa8eb9fcff084a8b2d866783a68c089f2b2b1e
        • MD5 SHA1 SHA512 SSDEEP

        hhfbcimj.tmp

        • Path C:\Windows\System32\hhfbcimj.tmp
        • Size 1.3MB
        • SHA256 3b12cb1dc5c86081218d54fdf7f61b2d2ab3e5b448043e472acf5d52ea211f98
        • MD5 SHA1 SHA512 SSDEEP

        TrustedInstaller.exe

        • Path C:\Windows\servicing\TrustedInstaller.exe
        • Size 193KB
        • SHA256 73684e31ad4afe3fdc525b51ccaacc14d402c92db9c42e3fcbfe1e65524b1c01
        • MD5 SHA1 SHA512 SSDEEP

        wmpnetwk.exe

        • Path \??\c:\program files\windows media player\wmpnetwk.exe
        • Size 1.5MB
        • SHA256 64e456edff39f0d53de141c048dbfc931b07bde7b5ea2e2c693b4217c53c270e
        • MD5 SHA1 SHA512 SSDEEP

        Agentservice.exe

        • Path \??\c:\windows\system32\Agentservice.exe
        • Size 1.7MB
        • SHA256 a93aade99aaaecd2e250ad7d51c47542d33f3dbbe4bd5bf67fdcc2d8982304f2
        • MD5 SHA1 SHA512 SSDEEP

        fxssvc.exe

        • Path \??\c:\windows\system32\fxssvc.exe
        • Size 1.2MB
        • SHA256 7afb36f4581d1e4dfdc779514d1388d03f755f8e2fadeb38a864f636c9ec8728
        • MD5 SHA1 SHA512 SSDEEP

        msdtc.exe

        • Path \??\c:\windows\system32\msdtc.exe
        • Size 700KB
        • SHA256 1caccfac60e2d18afa7a2720c25f448b3e8df29fb01697bc105d47ed7843f80f
        • MD5 SHA1 SHA512 SSDEEP

        msiexec.exe

        • Path \??\c:\windows\system32\msiexec.exe
        • Size 623KB
        • SHA256 267c7cb658da8652da6c04b604b205bafbdbcae0f5f689e03bbd014ee15b6534
        • MD5 SHA1 SHA512 SSDEEP

        snmptrap.exe

        • Path \??\c:\windows\system32\snmptrap.exe
        • Size 572KB
        • SHA256 fd2e248391b6bb0860b4ba6de3e4c2d42013414796d9c2d19ec34a960a19b476
        • MD5 SHA1 SHA512 SSDEEP

        wbengine.exe

        • Path \??\c:\windows\system32\wbengine.exe
        • Size 2.1MB
        • SHA256 294586c35286b6b232b25b1501efbb97a0864b51671fac6fadde85aedadcf747
        • MD5 SHA1 SHA512 SSDEEP

        memory/1092-0-0x0000000000400000-0x0000000000668000-memory.dmp

        memory/1092-1-0x0000000000402000-0x0000000000403000-memory.dmp

        memory/1092-2-0x0000000000400000-0x0000000000668000-memory.dmp

        memory/1656-52-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/1656-61-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/1656-36-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/1980-21-0x00000001400B2000-0x00000001400B3000-memory.dmp

        memory/1980-20-0x0000000140000000-0x0000000140418000-memory.dmp

        memory/1980-111-0x0000000140000000-0x0000000140418000-memory.dmp

        memory/3984-29-0x0000000140000000-0x000000014040F000-memory.dmp

        memory/3984-28-0x0000000140000000-0x000000014040F000-memory.dmp

        memory/3984-112-0x0000000140000000-0x000000014040F000-memory.dmp

        memory/4004-164-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/4004-60-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/4972-175-0x0000000140000000-0x00000001402E6000-memory.dmp

        memory/4972-74-0x0000000140000000-0x00000001402E6000-memory.dmp