Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/10/2022, 08:56

General

  • Target
    wynmove (1).js
  • Size 25KB
  • Sample221027-kv1m3sbfb8
  • SHA256 7c99d386a0f2df0ef6bc6adc32207bec986ec5784e102081441c2299487af118
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • wshrat

C2
  • http://45.139.105.174:7670

Signatures

  • WSHRAT

    WSHRAT is a variant of Houdini worm and has vbs and js variants.

  • Blocklisted process makes network request 25 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 24 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe "C:\Users\Admin\AppData\Local\Temp\wynmove (1).js"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1152
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\wynmove (1).js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:4476

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        wynmove (1).js

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wynmove (1).js
        • Size 25KB
        • SHA256 7c99d386a0f2df0ef6bc6adc32207bec986ec5784e102081441c2299487af118
        • MD5 SHA1 SHA512 SSDEEP

        wynmove (1).js

        • Path C:\Users\Admin\AppData\Roaming\wynmove (1).js
        • Size 25KB
        • SHA256 7c99d386a0f2df0ef6bc6adc32207bec986ec5784e102081441c2299487af118
        • MD5 SHA1 SHA512 SSDEEP