vjw0rm | a5d5de41b6546981f2284c07aa2fe17ac0b15727fb96fdff33db020a0826810e

Analysis

max time kernel
141s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-01-2025 22:37

Target

JaffaCakes118_b082682e872f7c1ba8efeebf629a4f3f.js
Size

10KB
MD5

b082682e872f7c1ba8efeebf629a4f3f
SHA1

aa013d976095c46964405e95ce022224c0a033ae
SHA256

a5d5de41b6546981f2284c07aa2fe17ac0b15727fb96fdff33db020a0826810e
SHA512

4329c35805fbfac63d683ec1ef69c039bde4fbe8d1951b8b79cf84cbf296556ee5d9e58e6ce77f81fd39cc05eec993775d015b760e77e9fe39d65767c2bb01a9
SSDEEP

192:1ArI5xl5+bHx29xCdac8zMAdG6o4zl5kDUWFrYNPTJmx4+RRB:1Ioxl5+2IgclAdG/4z3kDUWFri8iK

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-1-5-21-3350944739-639801879-157714471-1000\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_b082682e872f7c1ba8efeebf629a4f3f.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JaffaCakes118_b082682e872f7c1ba8efeebf629a4f3f.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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\F4ZGVI2L3S = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\JaffaCakes118_b082682e872f7c1ba8efeebf629a4f3f.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
428	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4888 wrote to memory of 428	4888	wscript.exe	84
PID 4888 wrote to memory of 428	4888	wscript.exe	84

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_b082682e872f7c1ba8efeebf629a4f3f.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:4888
- 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_b082682e872f7c1ba8efeebf629a4f3f.js
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:428