Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    20-05-2021 12:03

General

  • Target

    Invoice #0916.js

  • Size

    3KB

  • MD5

    b8a96b02e16725f2b872f283c7add748

  • SHA1

    5a6f87070e376ade44c81dce6b126f700faac1e4

  • SHA256

    a6b13cb06dc5d0650a6cb8f4c38f7f3aacb8fca0ef110102d52a1b0cc8c09afc

  • SHA512

    0decac78022fbe1ea68a143cad35c5f77bc5d43cca8ce4f1e89cd20cae8a5f6a1394cf07a7dac1e57626b76a7d07b40a419ac2b0716373ea11bbd1b8ee018dd5

Malware Config

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 1 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\Invoice #0916.js"
    1⤵
    • Blocklisted process makes network request
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1676
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Invoice #0916.js
      2⤵
      • Creates scheduled task(s)
      PID:1184

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/1184-60-0x0000000000000000-mapping.dmp