Analysis

  • max time kernel
    150s
  • max time network
    53s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    12/10/2026, 23:16

General

  • Target
    JusTalk Meet-1.0.0.exe
  • Size 9.0MB
  • Sample261012-2866fssvcz
  • SHA256 9f21d785ccc99c15b0cbde7141fda3a1f80801ab3ff3e014bcb70f886f8e0948
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Creates a file in the Startup directory 1 TTPs 1 IoCs

    A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 18 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Drops file in Program Files directory 50 IoCs
  • Drops file in Windows directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Inno Setup is an open-source installation builder for Windows applications. 3 IoCs

    Inno Setup installer

  • Modifies registry class 9 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JusTalk Meet-1.0.0.exe
    "C:\Users\Admin\AppData\Local\Temp\JusTalk Meet-1.0.0.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:6016
    • C:\Users\Admin\AppData\Local\Temp\is-AE9I4.tmp\JusTalk Meet-1.0.0.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-AE9I4.tmp\JusTalk Meet-1.0.0.tmp" /SL5="$400BA,9061627,286720,C:\Users\Admin\AppData\Local\Temp\JusTalk Meet-1.0.0.exe"
      2⤵
      • Creates a file in the Startup directory
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:4572
      • C:\Program Files (x86)\JusTalk Meet\JusTalk Meet.exe
        "C:\Program Files (x86)\JusTalk Meet\JusTalk Meet.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:6108
  • C:\PROGRA~2\JUSTAL~1\JusTalk Meet.exe
    C:\PROGRA~2\JUSTAL~1\JUSTAL~1.EXE
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Drops file in Windows directory
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:3436
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x00000000000004F0 0x00000000000004F8
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1944
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:5028

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          AutoUpdater.NET.dll

          • Path C:\PROGRA~2\JUSTAL~1\AutoUpdater.NET.dll
          • Size 405KB
          • SHA256 7c6c98a034088061763c6a7bcb90b21af1655e795c1fd2a9a3eed1e77ae84191
          • MD5 SHA1 SHA512 SSDEEP TLSH

          GalaSoft.MvvmLight.Extras.dll

          • Path C:\PROGRA~2\JUSTAL~1\GalaSoft.MvvmLight.Extras.dll
          • Size 21KB
          • SHA256 8e248e95e6dc65317af9caaf6a43091d5cb75fd1302bae0a49dea821fa21dc8e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          GalaSoft.MvvmLight.dll

          • Path C:\PROGRA~2\JUSTAL~1\GalaSoft.MvvmLight.dll
          • Size 28KB
          • SHA256 60ffbd8a891acbe1adbe79d320806a32ae826575f5218a51379ffc83f03f62a7
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Microsoft.Practices.ServiceLocation.dll

          • Path C:\PROGRA~2\JUSTAL~1\Microsoft.Practices.ServiceLocation.dll
          • Size 17KB
          • SHA256 34005d6a80434542780c6d192e6abd07bea49b2eeb7e43fbfdfe90c2889986e5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          bzip2.dll

          • Path C:\PROGRA~2\JUSTAL~1\bzip2.dll
          • Size 67KB
          • SHA256 da25db24809479051d980be5e186926dd53233a76dfe357a455387646befca76
          • MD5 SHA1 SHA512 SSDEEP TLSH

          mtc.dll

          • Path C:\PROGRA~2\JUSTAL~1\mtc.dll
          • Size 16.0MB
          • SHA256 bebebf7d19ea0615930d44ba61e15a90478c8a92f7038bf3827ec0107349be4f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          zmf.dll

          • Path C:\PROGRA~2\JUSTAL~1\zmf.dll
          • Size 1.7MB
          • SHA256 b231485ca2a8a6d4effda507f4f441b48202fe876da72c85ac548afe92899b51
          • MD5 SHA1 SHA512 SSDEEP TLSH

          zmfmanaged.dll

          • Path C:\PROGRA~2\JUSTAL~1\zmfmanaged.dll
          • Size 23KB
          • SHA256 1ceec7ce6dc0f6e170405bb864b2db9a78e7ebe4c64f156eb99fe8594ca34c72
          • MD5 SHA1 SHA512 SSDEEP TLSH

          JCSDK.dll

          • Path C:\Program Files (x86)\JusTalk Meet\JCSDK.dll
          • Size 198KB
          • SHA256 8f1d57ae59539688ad9bea44e9d28ec9e2a19e86700fcab14c8c727b4cc97e71
          • MD5 SHA1 SHA512 SSDEEP TLSH

          JusTalk Meet.exe

          • Path C:\Program Files (x86)\JusTalk Meet\JusTalk Meet.exe
          • Size 2.3MB
          • SHA256 f6c8a0a6f99670760737c477125fbad15d8434ddfa3fb2b919f327a53aa597ae
          • MD5 SHA1 SHA512 SSDEEP TLSH

          mtcmanaged.dll

          • Path C:\Program Files (x86)\JusTalk Meet\mtcmanaged.dll
          • Size 458KB
          • SHA256 0afd65b8e826cc0d31f4f9a770d239e9355ef772f4ef8310abbd1e0c5186b3e6
          • MD5 SHA1 SHA512 SSDEEP TLSH

          mtcwrap.dll

          • Path C:\Program Files (x86)\JusTalk Meet\mtcwrap.dll
          • Size 313KB
          • SHA256 d92300fa1b0688d6f4a4b08edd352ec5c66ada670ebf4b88b3e1fda5d757505f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          unins000.exe

          • Path C:\Program Files (x86)\JusTalk Meet\unins000.exe
          • Size 1.3MB
          • SHA256 9a43ad92549b8ed46b3bf83788f56c9a0aa1e410934be72ed058f8815c03fceb
          • MD5 SHA1 SHA512 SSDEEP TLSH

          JusTalk Meet-1.0.0.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\is-AE9I4.tmp\JusTalk Meet-1.0.0.tmp
          • Size 1.3MB
          • SHA256 cf8f905240720a9e01c67d54d71ec55c22d78e31ed9ddfc021485535ad7a7fca
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/3436-106-0x0000000003490000-0x00000000034E6000-memory.dmp

          memory/3436-140-0x0000000006E20000-0x0000000006E2A000-memory.dmp

          memory/3436-107-0x0000000073010000-0x00000000737CC000-memory.dmp

          memory/3436-120-0x0000000006AF0000-0x0000000006B28000-memory.dmp

          memory/3436-165-0x0000000011BD0000-0x0000000011BDE000-memory.dmp

          memory/3436-116-0x0000000006C60000-0x0000000006CD8000-memory.dmp

          memory/3436-105-0x0000000000AE0000-0x0000000000D2E000-memory.dmp

          memory/3436-112-0x0000000006BF0000-0x0000000006C5C000-memory.dmp

          memory/3436-104-0x0000000073022000-0x0000000073023000-memory.dmp

          memory/3436-164-0x0000000011C00000-0x0000000011C3E000-memory.dmp

          memory/3436-163-0x0000000011370000-0x000000001138C000-memory.dmp

          memory/3436-132-0x0000000006DF0000-0x0000000006DFE000-memory.dmp

          memory/3436-162-0x0000000011340000-0x0000000011348000-memory.dmp

          memory/3436-161-0x000000000CD00000-0x000000000CD0C000-memory.dmp

          memory/3436-136-0x0000000006E10000-0x0000000006E1C000-memory.dmp

          memory/3436-108-0x0000000006B50000-0x0000000006BE2000-memory.dmp

          memory/3436-141-0x000000000A000000-0x000000000A5BA000-memory.dmp

          memory/3436-143-0x000000000AAF0000-0x000000000B01C000-memory.dmp

          memory/3436-157-0x000000000B340000-0x000000000B34A000-memory.dmp

          memory/3436-150-0x0000000073010000-0x00000000737CC000-memory.dmp

          memory/3436-148-0x0000000068440000-0x0000000068457000-memory.dmp

          memory/3436-149-0x0000000073022000-0x0000000073023000-memory.dmp

          memory/4572-146-0x0000000000400000-0x0000000000555000-memory.dmp

          memory/4572-6-0x0000000002330000-0x0000000002331000-memory.dmp

          memory/4572-9-0x0000000000400000-0x0000000000555000-memory.dmp

          memory/4572-10-0x0000000002330000-0x0000000002331000-memory.dmp

          memory/4572-12-0x0000000000400000-0x0000000000555000-memory.dmp

          memory/6016-147-0x0000000000400000-0x0000000000450000-memory.dmp

          memory/6016-8-0x0000000000400000-0x0000000000450000-memory.dmp

          memory/6016-0-0x0000000000400000-0x0000000000450000-memory.dmp