Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    04/08/2026, 16:20

General

  • Target
    59670e93feea4f3e9256fbd3a39ef9c27a9a153bd8eae83dc6d7d09982348274.exe
  • Size 45KB
  • Sample260804-ts28kasthv
  • SHA256 59670e93feea4f3e9256fbd3a39ef9c27a9a153bd8eae83dc6d7d09982348274
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • asyncrat

Version
  • 0.5.8

Botnet
  • Default

C2
  • phimvkl.com:80

  • phimvkl.com:22

  • phimvkl.com:8080

  • phimvkl.com:8880

  • phimvkl.com:2052

  • phimvkl.com:2082

  • phimvkl.com:2086

  • phimvkl.com:2095

  • phimvkl.com:443

  • phimvkl.com:2053

  • phimvkl.com:2083

  • phimvkl.com:2087

  • phimvkl.com:2096

  • phimvkl.com:8443

  • www.phimvkl.com:80

  • www.phimvkl.com:22

  • www.phimvkl.com:8080

  • www.phimvkl.com:8880

  • www.phimvkl.com:2052

  • www.phimvkl.com:2082

Mutex
  • 1BkWZcU2Qr9o

Attributes
  • delay

    0

  • install

    true

  • install_file

    mbxzm.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • Family: AsyncRat

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

  • Async RAT 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.

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

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

  • 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 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\59670e93feea4f3e9256fbd3a39ef9c27a9a153bd8eae83dc6d7d09982348274.exe
    "C:\Users\Admin\AppData\Local\Temp\59670e93feea4f3e9256fbd3a39ef9c27a9a153bd8eae83dc6d7d09982348274.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1720
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "mbxzm" /tr '"C:\Users\Admin\AppData\Roaming\mbxzm.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1716
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "mbxzm" /tr '"C:\Users\Admin\AppData\Roaming\mbxzm.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:5356
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8C2E.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3568
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:4680
      • C:\Users\Admin\AppData\Roaming\mbxzm.exe
        "C:\Users\Admin\AppData\Roaming\mbxzm.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:1816
  • C:\Users\Admin\AppData\Roaming\mbxzm.exe
    "C:\Users\Admin\AppData\Roaming\mbxzm.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:3016

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmp8C2E.tmp.bat

        • Path C:\Users\Admin\AppData\Local\Temp\tmp8C2E.tmp.bat
        • Size 149B
        • SHA256 2ef7682ffe4ff5465a13ab4dd777d6ae4ff7a4daa77d4acb74cafb483ca7da10
        • MD5 SHA1 SHA512 TLSH

        mbxzm.exe

        • Path C:\Users\Admin\AppData\Roaming\mbxzm.exe
        • Size 45KB
        • SHA256 59670e93feea4f3e9256fbd3a39ef9c27a9a153bd8eae83dc6d7d09982348274
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/1720-0-0x0000000000A90000-0x0000000000AA2000-memory.dmp

        memory/1720-1-0x0000000005450000-0x0000000005460000-memory.dmp

        memory/1720-2-0x0000000005460000-0x00000000054FC000-memory.dmp

        memory/3016-10-0x00000000024B0000-0x00000000024C0000-memory.dmp

        memory/3016-13-0x00000000024B0000-0x00000000024C0000-memory.dmp