Analysis

  • max time kernel
    153s
  • max time network
    159s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    02-12-2021 16:29

General

  • Target

    Paid-Invoice.js

  • Size

    9KB

  • MD5

    5a78ce5d4ae0c6fb3dfc30056da39d20

  • SHA1

    ee29630daf78a9dc5bbd0c279bd9c82f560536c3

  • SHA256

    da04c2f890db89ea8d49585214a52b105eeb0c80e72c968e5147099bf411668e

  • SHA512

    eaf467a84a4ebc49735fee3c68da4947eef08905b8a9752aaaf6f74b4561444fa4b8f232ce2f47621fa9d03ff614615494565ae9b10465899c2d8ebaa78d66fa

Malware Config

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 19 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 2 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\Paid-Invoice.js
    1⤵
    • Blocklisted process makes network request
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:2904
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Paid-Invoice.js
      2⤵
      • Creates scheduled task(s)
      PID:1908

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1908-118-0x0000000000000000-mapping.dmp