Analysis

  • max time kernel
    156s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    13-12-2021 20:10

General

  • Target

    Order20827.js

  • Size

    307KB

  • MD5

    d3d3edd039a3e591e822bb981e7e1fc7

  • SHA1

    dc79c1c6268f32dbe746394868db3d23bd4e4126

  • SHA256

    528452ce702d1bc05f0c968137625ae1518faf152aeac200948e39974c6ef4cf

  • SHA512

    f377e3a8d3816130cf5db479e980bfad2b2dc13b86b7eee297b0fb9982a808751e429bbd10263fa6b61a066869e67bb88205ae83f27d5527e99cd7c9b5dfba95

Malware Config

Extracted

Family

vjw0rm

C2

http://dwal-vesj.duckdns.org:29563

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 18 IoCs
  • Drops startup file 4 IoCs
  • Adds Run key to start application 2 TTPs 4 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 6 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\Order20827.js
    1⤵
    • Blocklisted process makes network request
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1672
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\cAcMvTWMWr.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:268
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Order20827.js
      2⤵
      • Creates scheduled task(s)
      PID:1832

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

  • C:\Users\Admin\AppData\Roaming\cAcMvTWMWr.js
    MD5

    3dc6e38070337cd2f2ad3212b8f01374

    SHA1

    d19f419607ba2f2f64689f1ed43b4ddd2df2a8b2

    SHA256

    e81b55f2232dfaea360908e0046d4997a030f9e8113e5ca8f02a6f3598a4c111

    SHA512

    2e4e75339c0c2b775f90d4e8ed865dd9f3e9fc8603b6244f80ae64eede38806b8f76954698b5d0e41c31b4243520fc441c964c55ad481629cdd36eb4b98f7514

  • memory/268-55-0x0000000000000000-mapping.dmp
  • memory/1832-57-0x0000000000000000-mapping.dmp