Analysis

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

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/01/2025, 17:42

General

  • Target
    JaffaCakes118_7af9483222993994df1885ebe57c8740.exe
  • Size 611KB
  • Sample250104-v925kazmax
  • SHA256 f5377f544d5c05daff97e1dc9614700a6bc32c080c00e173b402fec9a3aad1b2
  • 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 5 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 2 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_7af9483222993994df1885ebe57c8740.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7af9483222993994df1885ebe57c8740.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:3432
  • 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:868
  • 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:3204
  • C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
    "C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe"
    1⤵
    • Executes dropped EXE
    PID:3852
  • \??\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:1156
  • C:\Windows\System32\OpenSSH\ssh-agent.exe
    C:\Windows\System32\OpenSSH\ssh-agent.exe
    1⤵
    • Executes dropped EXE
    PID:1660

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 fd3a96c5fc77a98c78010bef1d05d6c2e11956c8ac840f7bfdeb951558d63d39
        • MD5 SHA1 SHA512 SSDEEP

        maintenanceservice.exe

        • Path C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
        • Size 781KB
        • SHA256 ca6319aaf46f1ef009d26c42a04ac6b49a3310eb265bac8d5a50e865281f3a3b
        • MD5 SHA1 SHA512 SSDEEP

        7z.exe

        • Path C:\Program Files\7-Zip\7z.exe
        • Size 1.1MB
        • SHA256 5b94224099aafb4294a84cd6ebaed3b11e0bbb6d48066633425e01e50041b05c
        • MD5 SHA1 SHA512 SSDEEP

        7zFM.exe

        • Path C:\Program Files\7-Zip\7zFM.exe
        • Size 1.5MB
        • SHA256 dc7d0bbe84f2d32d515c8b4e5c50e4366a781676fa8ad5f7a7847493cd3e62e6
        • MD5 SHA1 SHA512 SSDEEP

        7zG.exe

        • Path C:\Program Files\7-Zip\7zG.exe
        • Size 1.2MB
        • SHA256 ecee5c2da48d92a913dc1033efd9ae173cf450a5a650b6c14a2e57de1f6558c9
        • MD5 SHA1 SHA512 SSDEEP

        AppVShNotify.exe

        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVShNotify.exe
        • Size 832KB
        • SHA256 941b1b6e5f5f7b4df48305cb08142d778b2b8866de65e2b16645e69e7b82990d
        • MD5 SHA1 SHA512 SSDEEP

        IntegratedOffice.exe

        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\IntegratedOffice.exe
        • Size 4.6MB
        • SHA256 d52328c3b1c542f9534a4375c30d2633c0d6a87f3027f27440471c67926dfe4a
        • MD5 SHA1 SHA512 SSDEEP

        MavInject32.exe

        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\MavInject32.exe
        • Size 898KB
        • SHA256 29fb41c89d6a2c72db356bb9f4d984f98d6b0a4df965c4ad07803fc730795f22
        • MD5 SHA1 SHA512 SSDEEP

        OfficeC2RClient.exe

        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe
        • Size 24.0MB
        • SHA256 c71d61361e6cc2c4f472095bd1f17a4eadb3fdf441de864ac8f6dd3a63dea16f
        • MD5 SHA1 SHA512 SSDEEP

        appvcleaner.exe

        • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\appvcleaner.exe
        • Size 2.7MB
        • SHA256 044d935a18b0980076cc186b06d7e38b455cff109acbd110b23823d50fa60782
        • MD5 SHA1 SHA512 SSDEEP

        OSE.EXE

        • Path C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE
        • Size 797KB
        • SHA256 5e917972aae7ca0cde2e51d35816c92a505862882e1f79095511b5d66f94107e
        • MD5 SHA1 SHA512 SSDEEP

        cpkcoelj.tmp

        • Path C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\cpkcoelj.tmp
        • Size 4.6MB
        • SHA256 1f69ea7bd1f8393e06724336d54378e71f24f5252a324c726ce2af9e56ecb20d
        • 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 b80548fced908cb898d968497a2a699067d355f4d7e0d62085c0ddde9ca0164a
        • MD5 SHA1 SHA512 SSDEEP

        iexplore.exe

        • Path C:\Program Files\Internet Explorer\iexplore.exe
        • Size 1.3MB
        • SHA256 5d179137a01469eca7f3efdd247f77720fce4fb4bcee57fe49eff6bad77709f6
        • MD5 SHA1 SHA512 SSDEEP

        powershell.exe

        • Path C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        • Size 978KB
        • SHA256 da061caa3849a434b2a9a4605a1a687a3e7e4972e8f7e5b2c08751c9bc131f0c
        • MD5 SHA1 SHA512 SSDEEP

        ssh-agent.exe

        • Path C:\Windows\System32\OpenSSH\ssh-agent.exe
        • Size 932KB
        • SHA256 7a4b58ac1ab66535800a38d3b55bb9b765b2e0090abe0be84a12953346372e4f
        • MD5 SHA1 SHA512 SSDEEP

        oaiiamdl.tmp

        • Path C:\Windows\System32\oaiiamdl.tmp
        • Size 1.3MB
        • SHA256 68d64249ae7506e050f69b74e14e6418da78eb8e1e3002ae25aaf113f40810ec
        • MD5 SHA1 SHA512 SSDEEP

        wmpnetwk.exe

        • Path \??\c:\program files\windows media player\wmpnetwk.exe
        • Size 1.5MB
        • SHA256 0cc9bed97e72824994870bd22231a0de27aabc34b958a02b756fc877db772746
        • MD5 SHA1 SHA512 SSDEEP

        Agentservice.exe

        • Path \??\c:\windows\system32\Agentservice.exe
        • Size 1.7MB
        • SHA256 3e18067b23185fc8e98dbdd9acb768dce43aa1c00b770eb2ce983f5deca48474
        • MD5 SHA1 SHA512 SSDEEP

        fxssvc.exe

        • Path \??\c:\windows\system32\fxssvc.exe
        • Size 1.2MB
        • SHA256 eb3d120c1ffcfafe36477b370d7b0d81933ab0fcc95b6b0fb423a4ac90966fe0
        • MD5 SHA1 SHA512 SSDEEP

        msdtc.exe

        • Path \??\c:\windows\system32\msdtc.exe
        • Size 700KB
        • SHA256 0525fbb2acc1959ca8747b9d8ea2191067b17648a0f8d60c9079218ac0b5fda2
        • MD5 SHA1 SHA512 SSDEEP

        msiexec.exe

        • Path \??\c:\windows\system32\msiexec.exe
        • Size 623KB
        • SHA256 30246ce3c9024713f709944b179de091bdc93c137413dbd2a205c97fb0a789e8
        • MD5 SHA1 SHA512 SSDEEP

        snmptrap.exe

        • Path \??\c:\windows\system32\snmptrap.exe
        • Size 572KB
        • SHA256 586c2bb5e66b8ca27653572cffe7fbf2d3b71d3ee7360886c498849b83dbfd7e
        • MD5 SHA1 SHA512 SSDEEP

        wbengine.exe

        • Path \??\c:\windows\system32\wbengine.exe
        • Size 2.1MB
        • SHA256 ca8bb88c2ced615a6dbfa1375eaab9dba8c62026ab0089ad83bb6204a8c18045
        • MD5 SHA1 SHA512 SSDEEP

        memory/868-21-0x00000001400B2000-0x00000001400B3000-memory.dmp

        memory/868-20-0x0000000140000000-0x0000000140418000-memory.dmp

        memory/868-118-0x0000000140000000-0x0000000140418000-memory.dmp

        memory/1156-62-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/1156-154-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/1156-63-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/1156-157-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/1660-76-0x0000000140000000-0x00000001402E6000-memory.dmp

        memory/1660-168-0x0000000140000000-0x00000001402E6000-memory.dmp

        memory/3204-119-0x0000000140000000-0x000000014040F000-memory.dmp

        memory/3204-29-0x0000000140000000-0x000000014040F000-memory.dmp

        memory/3204-28-0x0000000140000000-0x000000014040F000-memory.dmp

        memory/3432-0-0x0000000000400000-0x000000000065A000-memory.dmp

        memory/3432-2-0x0000000000400000-0x000000000065A000-memory.dmp

        memory/3432-1-0x0000000000401000-0x0000000000402000-memory.dmp

        memory/3852-37-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/3852-36-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/3852-60-0x0000000140000000-0x00000001402B3000-memory.dmp

        memory/3852-59-0x0000000140000000-0x00000001402B3000-memory.dmp