Analysis

  • max time kernel
    166s
  • max time network
    171s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    08/02/2022, 01:26

General

  • Target
    VBR006JSANQW.js
  • Size 13KB
  • Sample220208-btjthabfe6
  • SHA256 bbd977223b6cb63ad932d09bbf5ee2ba813318ced7b8cc20f18fbb51e22bc44e
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 16 IoCs
  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\VBR006JSANQW.js
    1⤵
    • Blocklisted process makes network request
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1592
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\VBR006JSANQW.js
      2⤵
      • Creates scheduled task(s)
      PID:1556

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1592-54-0x000007FEFBAE1000-0x000007FEFBAE3000-memory.dmp