vjw0rm | 73b2e38a3dcf49abe626541ba88c22d45b00fef21c6536f083b24c611739e397

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06-01-2025 17:00

Target

JaffaCakes118_2f82007c9b5d792e69074e710221b1f6.js
Size

10KB
MD5

2f82007c9b5d792e69074e710221b1f6
SHA1

89f48914102c6cff10013150d8f79c31b3b7315b
SHA256

73b2e38a3dcf49abe626541ba88c22d45b00fef21c6536f083b24c611739e397
SHA512

53dff7fda8e270743ec91cff1876dce4490c2e4b33977abe58a9a987a214f77107e03f0f6582da2b82e20556ba0535cad8b503bca6ab8944c0ebff2ecd8a5d45
SSDEEP

192:L9B/5ruIwI0nAJ5oLHjP29xE11sgLjPcOAze48unfmMNEX+FOio3I/UH:L9HWBjexEAEjPcOAzj8WmMypdB

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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JaffaCakes118_2f82007c9b5d792e69074e710221b1f6.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JaffaCakes118_2f82007c9b5d792e69074e710221b1f6.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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\JX0T7EQ31M = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\JaffaCakes118_2f82007c9b5d792e69074e710221b1f6.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
3524	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 3524	4944	wscript.exe	84
PID 4944 wrote to memory of 3524	4944	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_2f82007c9b5d792e69074e710221b1f6.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:4944
- 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_2f82007c9b5d792e69074e710221b1f6.js
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3524