Analysis

  • max time kernel
    145s
  • max time network
    149s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    08-12-2021 19:17

General

  • Target

    receipt_ups.js

  • Size

    22KB

  • MD5

    45da0659e1a6f35fc8c740dafcbb5435

  • SHA1

    083d64752001598e019b8a74db75f992121f7cf5

  • SHA256

    1b706876d4f0d013e451fecd02d7f5486650efe4593bac4e74d51d0d164d3fb9

  • SHA512

    0125b2f121db439fd64552e1c854d7e9fdc30c0fc3c380676c20c21987118739f6d2ff89b72a1e155d4c276ea12d12c836180a096d341d66f2c7fcc5209a0210

Malware Config

Extracted

Family

vjw0rm

C2

http://zeegod.duckdns.org:9998

Signatures

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 19 IoCs
  • Drops startup file 3 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 4 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\receipt_ups.js
    1⤵
    • Blocklisted process makes network request
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:2636
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\ZZRlKoGvgy.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      PID:3748
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\receipt_ups.js
      2⤵
      • Creates scheduled task(s)
      PID:3696

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\ZZRlKoGvgy.js
    MD5

    b08acc841bc0948b0892a8420e71bc08

    SHA1

    5e71337164e700afdc9fe01368faac4b1509480d

    SHA256

    83067e15bd60e591b11f99220d11702b312d062120d82886660d02cfed5786ad

    SHA512

    3462e057cf0e35d726d5f8139b140a7d638da358b69ff87769a1fc217e7265a18fffbe59ca018f054b58607bad1eb60b9ee2d5e3db4047cb46e275bd9dd58329

  • memory/3696-117-0x0000000000000000-mapping.dmp
  • memory/3748-115-0x0000000000000000-mapping.dmp