Analysis

  • max time kernel
    150s
  • 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
    27/08/2026, 12:26

General

  • Target
    ven9392.exe
  • Size 3.3MB
  • Sample260827-pmjrtavanb
  • SHA256 155d1dce8e17b107b531b80b648f1a3fcbcbed764d76a39b0b3972d9424dd2f7
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Family: StormKitty

    StormKitty is an open source info stealer written in C#.

  • Async RAT payload 1 IoCs
  • StormKitty payload 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\ven9392.exe
    "C:\Users\Admin\AppData\Local\Temp\ven9392.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4600
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Wihnup" /tr '"C:\Users\Admin\AppData\Local\Temp\Wihnup.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:1444
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Wihnup" /tr '"C:\Users\Admin\AppData\Local\Temp\Wihnup.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1748
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4AC0.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:3984
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:312
      • C:\Users\Admin\AppData\Local\Temp\Wihnup.exe
        "C:\Users\Admin\AppData\Local\Temp\Wihnup.exe"
        3⤵
        • Executes dropped EXE
        PID:4756
  • C:\Users\Admin\AppData\Local\Temp\Wihnup.exe
    "C:\Users\Admin\AppData\Local\Temp\Wihnup.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:2900

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        Wihnup.exe

        • Path C:\Users\Admin\AppData\Local\Temp\Wihnup.exe
        • Size 3.3MB
        • SHA256 155d1dce8e17b107b531b80b648f1a3fcbcbed764d76a39b0b3972d9424dd2f7
        • MD5 SHA1 SHA512 SSDEEP TLSH

        tmp4AC0.tmp.bat

        • Path C:\Users\Admin\AppData\Local\Temp\tmp4AC0.tmp.bat
        • Size 153B
        • SHA256 c97d431acf0b283bc18fc86fa06e2aee98559a6ebfa296083a7eba1b1b79bff5
        • MD5 SHA1 SHA512 TLSH

        memory/4600-0-0x00000000003B0000-0x00000000006FA000-memory.dmp

        memory/4600-1-0x000000001B180000-0x000000001B190000-memory.dmp