vjw0rm | ec94a85166da6bff3051c6960ff02eb964ed676d15a7d426b4a075c32d892a70

Analysis

max time kernel
144s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-01-2025 17:30

Target

JaffaCakes118_70248b64f0da47a78531964998bd071a.js
Size

3KB
MD5

70248b64f0da47a78531964998bd071a
SHA1

761b6341377def95d8558e806e6516b4548f8566
SHA256

ec94a85166da6bff3051c6960ff02eb964ed676d15a7d426b4a075c32d892a70
SHA512

e098e34bc1fdaed9b8e4c85699a2352344848bdf11e6590c8fdff22b489744e30bddebefd5e34b394ac5a0db50f725b281bf2907a542dbd0e1ee6bbf3e5f5215

Score

10^/10

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
Vjw0rm family
vjw0rm

Blocklisted process makes network request 6 IoCs

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JaffaCakes118_70248b64f0da47a78531964998bd071a.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JaffaCakes118_70248b64f0da47a78531964998bd071a.js	wscript.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\0OZMEL5YCB = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\JaffaCakes118_70248b64f0da47a78531964998bd071a.js\""	wscript.exe

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

Scheduled Task

pid	Process
3968	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4960 wrote to memory of 3968	4960	wscript.exe	83
PID 4960 wrote to memory of 3968	4960	wscript.exe	83

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_70248b64f0da47a78531964998bd071a.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4960
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_70248b64f0da47a78531964998bd071a.js
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3968