Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17/10/2022, 17:39

General

  • Target
    Required documents.js
  • Size 43KB
  • Sample221017-v793dscfgp
  • SHA256 ac185abc6d0778125db88c7ace54bbdbc5ebab18a3092ff817bcf4b963df0d87
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • wshrat

C2
  • http://185.252.178.17:5050

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • WSHRAT

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

  • Blocklisted process makes network request 31 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 5 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 17 IoCs

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

  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe "C:\Users\Admin\AppData\Local\Temp\Required documents.js"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4248
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\aNGaDnYogz.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      PID:4264
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\Required documents.js"
      2⤵
      • Blocklisted process makes network request
      • Checks computer location settings
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:3816
      • C:\Windows\System32\wscript.exe
        "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\aNGaDnYogz.js"
        3⤵
        • Blocklisted process makes network request
        • Drops startup file
        PID:1972

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        Required documents.js

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Required documents.js
        • Size 43KB
        • SHA256 ac185abc6d0778125db88c7ace54bbdbc5ebab18a3092ff817bcf4b963df0d87
        • MD5 SHA1 SHA512 SSDEEP

        aNGaDnYogz.js

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\aNGaDnYogz.js
        • Size 7KB
        • SHA256 62e5bca2e55fc93399baccc38d42715f7161f30d865f1571a9f69b3520ee130b
        • MD5 SHA1 SHA512 SSDEEP

        Required documents.js

        • Path C:\Users\Admin\AppData\Roaming\Required documents.js
        • Size 43KB
        • SHA256 ac185abc6d0778125db88c7ace54bbdbc5ebab18a3092ff817bcf4b963df0d87
        • MD5 SHA1 SHA512 SSDEEP

        aNGaDnYogz.js

        • Path C:\Users\Admin\AppData\Roaming\aNGaDnYogz.js
        • Size 7KB
        • SHA256 62e5bca2e55fc93399baccc38d42715f7161f30d865f1571a9f69b3520ee130b
        • MD5 SHA1 SHA512 SSDEEP

        aNGaDnYogz.js

        • Path C:\Users\Admin\AppData\Roaming\aNGaDnYogz.js
        • Size 7KB
        • SHA256 62e5bca2e55fc93399baccc38d42715f7161f30d865f1571a9f69b3520ee130b
        • MD5 SHA1 SHA512 SSDEEP