vjw0rm | 81f1d78c95edb2952a13f5ec068a3b30be04c4e128c6348bc07439a4f4fdd82c

Analysis

max time kernel
144s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 02:19

Target
737ab81779d546b3ccc019569acb0269.js
Size 6KB
Sample240125-cr16faeegl
SHA256 81f1d78c95edb2952a13f5ec068a3b30be04c4e128c6348bc07439a4f4fdd82c
MD5 737ab81779d546b3ccc019569acb0269
SHA1 d746edccdfb5ba9f357ab6a6281c1c09c25b5912
SHA512 961b5f3f1913595352914bd159c34d3767b96494a5be211cd69dbe64f921b29a12321498298ee0c93e3b2c85a443c0fd9b4593dc73fe3266e8517e17e5bfa951
SSDEEP 192:Q5oLzuRWuuuuKtCbkIHHxcggPn5wDy4jn116My3:Q5oHKWuuuuJ3CggPMbY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm 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-1-5-21-635608581-3370340891-292606865-1000\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\737ab81779d546b3ccc019569acb0269.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\737ab81779d546b3ccc019569acb0269.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-1-5-21-635608581-3370340891-292606865-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GF5EHB4I0U = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\737ab81779d546b3ccc019569acb0269.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
4712	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4932 wrote to memory of 4712	4932	wscript.exe	87
PID 4932 wrote to memory of 4712	4932	wscript.exe	87

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\737ab81779d546b3ccc019569acb0269.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:4932
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\737ab81779d546b3ccc019569acb0269.js
  2⤵
  - Creates scheduled task(s)
  PID:4712