vjw0rm | a5d5de41b6546981f2284c07aa2fe17ac0b15727fb96fdff33db020a0826810e

Analysis

max time kernel
144s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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

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-1-5-21-4177215427-74451935-3209572229-1000\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
2552	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2552	2084	wscript.exe	31
PID 2084 wrote to memory of 2552	2084	wscript.exe	31
PID 2084 wrote to memory of 2552	2084	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_b082682e872f7c1ba8efeebf629a4f3f.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2084
- 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:2552