Overview

overview

10

Static

static

subCY_Wsinvoice.js

windows7-x64

10

subCY_Wsinvoice.js

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/10/2022, 11:41

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General

  • Target
    subCY_Wsinvoice.js
  • Size 258KB
  • Sample221019-ntxftafdb5
  • SHA256 b7966ac2c98ec6f85220d42a378a55081245b69ef730e5b6845468d5b66edeaa
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
vjw0rmwshratpersistencetrojanworm

Malware Config

Extracted

Family

  • wshrat

C2

  • http://213.226.123.91:1702

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

    trojanwormvjw0rm
  • WSHRAT

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

    trojanwshrat
  • Blocklisted process makes network request 43 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 4 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
    persistence
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 25 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\subCY_Wsinvoice.js
    1⤵
    • Blocklisted process makes network request
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1856
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\iVSTcIUUBw.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      PID:4544

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        iVSTcIUUBw.js
        • Path C:\Users\Admin\AppData\Roaming\iVSTcIUUBw.js
        • Size 5KB
        • SHA256 3a9e9a2de72fa83d0f4b11fef3737866e2c55994c146bdedb0774732908672ba
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download