Analysis

  • max time kernel
    35s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    13/08/2026, 15:14

General

  • Target
    a5b8aac7dcb57f901bc162a30495cc6bcb3df0415e121c1100bdcc1fc41e04a1.exe
  • Size 5.3MB
  • Sample260813-smdgksbn21
  • SHA256 a5b8aac7dcb57f901bc162a30495cc6bcb3df0415e121c1100bdcc1fc41e04a1
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Expiro, m0yv

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

  • Expiro payload 3 IoCs
  • Executes dropped EXE 8 IoCs
  • Enumerates connected drives 3 TTPs 21 IoCs

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

  • Drops file in System32 directory 61 IoCs
  • Drops file in Program Files directory 22 IoCs
  • Drops file in Windows directory 4 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: LoadsDriver 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a5b8aac7dcb57f901bc162a30495cc6bcb3df0415e121c1100bdcc1fc41e04a1.exe
    "C:\Users\Admin\AppData\Local\Temp\a5b8aac7dcb57f901bc162a30495cc6bcb3df0415e121c1100bdcc1fc41e04a1.exe"
    1⤵
    • 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
    • Suspicious use of SetWindowsHookEx
    PID:3464
  • C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
    "C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
    1⤵
    • Executes dropped EXE
    PID:4760
  • C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe"
    1⤵
    • Executes dropped EXE
    PID:5052
  • C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
    "C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe"
    1⤵
    • Executes dropped EXE
    PID:1432
  • \??\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:4688
  • C:\Windows\System32\OpenSSH\ssh-agent.exe
    C:\Windows\System32\OpenSSH\ssh-agent.exe
    1⤵
    • Executes dropped EXE
    PID:1864
  • C:\Windows\system32\AgentService.exe
    C:\Windows\system32\AgentService.exe
    1⤵
    • Executes dropped EXE
    PID:1768
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Executes dropped EXE
    PID:1172
  • C:\Windows\servicing\TrustedInstaller.exe
    C:\Windows\servicing\TrustedInstaller.exe
    1⤵
    • Executes dropped EXE
    • Drops file in Windows directory
    PID:3636

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        elevation_service.exe

        • Path C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe
        • Size 2.4MB
        • SHA256 ef8281883b06453fff66e3ac5982f53ec7892f9146d929e3d85c3306517b018d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        maintenanceservice.exe

        • Path C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
        • Size 498KB
        • SHA256 8198b9899bc771491b57dbd59ad0af8a633709b54aa29bfd4d7dfcae18a3a52a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        OSE.EXE

        • Path C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE
        • Size 477KB
        • SHA256 6681dcca255d4f4a9682b48686a08567d3e3f012ab6657aecd9515e7bcc75988
        • MD5 SHA1 SHA512 SSDEEP TLSH

        elevation_service.exe

        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
        • Size 2.5MB
        • SHA256 60ecfbea1eb5abe90eaee6e4e9eadbbf5cb5ca6ea480012a455257940086f971
        • MD5 SHA1 SHA512 SSDEEP TLSH

        powershell.exe

        • Path C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        • Size 658KB
        • SHA256 03cbedb52b1abef3acda64d4c7ffa2036a9f72e29e8b2a2f26304482e7f62a78
        • MD5 SHA1 SHA512 SSDEEP TLSH

        AgentService.exe

        • Path C:\Windows\System32\AgentService.exe
        • Size 1.4MB
        • SHA256 16fbf35535c40f48b7ba9a4ff95ec5bd9a44b09148789f9de30438a229c3226a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ssh-agent.exe

        • Path C:\Windows\System32\OpenSSH\ssh-agent.exe
        • Size 612KB
        • SHA256 4face3eb0ca9693cdeb0e9140bab9f19f282ad5bb3069730cdcdb2ba6c31c493
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dpbennjk.tmp

        • Path C:\Windows\System32\dpbennjk.tmp
        • Size 998KB
        • SHA256 ea01918dccac2a883b079a25de5766f91d3fd41820d7011bcc387afd3f127541
        • MD5 SHA1 SHA512 SSDEEP TLSH

        wbengine.exe

        • Path C:\Windows\System32\wbengine.exe
        • Size 1.7MB
        • SHA256 2630671915c08aa64294179ed20ab8470f63d24dfd7748d0c32edc64d3773282
        • MD5 SHA1 SHA512 SSDEEP TLSH

        TrustedInstaller.exe

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

        memory/3464-2-0x0000000000986000-0x00000000009E9000-memory.dmp

        memory/3464-0-0x0000000000986000-0x00000000009E9000-memory.dmp

        memory/3464-1-0x0000000000400000-0x00000000009E9000-memory.dmp