vjw0rm | 9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d

Analysis

max time kernel
141s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2024 21:57

Target

JaffaCakes118_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.js
Size

13KB
MD5

bda43336bf6249a4e667d207d62cc910
SHA1

9dc42b7d9dfd2b3f5a22e71abb0106fdc736bf4a
SHA256

9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d
SHA512

af80aa64ca5d29d5f1839b38330a158507faac2ec305242d94d4c041da65c8b8a8ed8c927e1cd6e1383f1fe1335a814c6d28b1bbc366e3de3d9898478edd1650
SSDEEP

384:jE+DtyRt9W+kdzGQ9FdtDbdP3AwOEIgrtm+7FOSE2:IZ76z3FjpnrFlr

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-1-5-21-4089630652-1596403869-279772308-1000\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_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JaffaCakes118_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ABR5SI7DKX = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\JaffaCakes118_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.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
4788	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 4788	1120	wscript.exe	83
PID 1120 wrote to memory of 4788	1120	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_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.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:1120
- 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_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.js
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4788