vjw0rm | 8f75fa05aebed182cf2bf13cfe8b26720a76d1328fcfeb6eb2b25d65d0f3f6a2

Analysis

max time kernel
148s
max time network
176s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31-01-2024 18:26

Target

84f3ed3670d569603a669686ec959f29.js
Size

3KB
MD5

84f3ed3670d569603a669686ec959f29
SHA1

2ffc746cff0df8052944f69e57ce28badb8f8549
SHA256

8f75fa05aebed182cf2bf13cfe8b26720a76d1328fcfeb6eb2b25d65d0f3f6a2
SHA512

61245362e1a6840501d8c3859171cc32bf80784b387d0965e80b85cd72a56b73276324c6565298fd881c9a0605645d30a23aaface0d5191941daa0a4f636b423

Score

10^/10

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 5 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-1-5-21-3073191680-435865314-2862784915-1000\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\84f3ed3670d569603a669686ec959f29.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\84f3ed3670d569603a669686ec959f29.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-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\V3MC6BTMP1 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\84f3ed3670d569603a669686ec959f29.js\""	wscript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

Scheduled Task/Job

pid	Process
4520	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 8 wrote to memory of 4520	8	wscript.exe	85
PID 8 wrote to memory of 4520	8	wscript.exe	85

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\84f3ed3670d569603a669686ec959f29.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:8
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\84f3ed3670d569603a669686ec959f29.js
  2⤵
  - Creates scheduled task(s)
  PID:4520