vjw0rm | 73b2e38a3dcf49abe626541ba88c22d45b00fef21c6536f083b24c611739e397

Analysis

max time kernel
145s
max time network
149s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-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

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JaffaCakes118_2f82007c9b5d792e69074e710221b1f6.js	wscript.exe
File opened for modification	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-1-5-21-1163522206-1469769407-485553996-1000\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
2928	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 624 wrote to memory of 2928	624	wscript.exe	31
PID 624 wrote to memory of 2928	624	wscript.exe	31
PID 624 wrote to memory of 2928	624	wscript.exe	31

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
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:624
- 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:2928