Analysis

  • max time kernel
    141s
  • max time network
    154s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    23-08-2021 09:51

General

  • Target

    ISO certification.js

  • Size

    17KB

  • MD5

    92aeab75b19a2fd42eb1da3f71e58554

  • SHA1

    dad3bfa343407c9269bbe928ef061bf4264bc429

  • SHA256

    bb22cb56b476332b2148367891089954d3e9f5af18104615920af794601c817d

  • SHA512

    b8adf49826b13260b6b7f2328224ec752e54cb808611d56be5a93b6b6a907b850fee9e60257c1b849bedab82949e52f432bfe80f7217f9fa67d9afb132bb2353

Malware Config

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 1 IoCs
  • Drops startup file 1 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\ISO certification.js"
    1⤵
    • Blocklisted process makes network request
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4048
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\ProgramData\ISO certification.js
      2⤵
      • Creates scheduled task(s)
      PID:1680

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/1680-114-0x0000000000000000-mapping.dmp