vjw0rm | c76700dd7e3de8aabaa19309caa7a1b83f3a175778d1b374315cdb362d4f7b50

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
07/02/2024, 07:27

Target
java.js
Size 504KB
Sample240207-jad3xafffk
SHA256 c76700dd7e3de8aabaa19309caa7a1b83f3a175778d1b374315cdb362d4f7b50
MD5 f9a2f407e3a96b98798ead405013535c
SHA1 085a55fc5e128fe2e18aa4d17c4762bf86b051a2
SHA512 f3c9d87e502a94492968ba5ca1f427f63e10ce137da773d5dc53376c9fcf907cbb4895c9150768a18a86fb6fb7a45e753c331e86ca24b94758a057f9758be332
SSDEEP 3072:U2I4IZk8bw+bDtRVP2QmYNWXo9phTMQ6EHqTNehzVqtSdbL6x7h2H+kzV4mWeOD0:U2I4IZkUVP2tYNWXoX/6qqTNeP
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 16 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 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\java.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\WRQHVYEJFL = "\"C:\\Users\\Admin\\AppData\\Roaming\\java.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
4632	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1772 wrote to memory of 4632	1772	wscript.exe	85
PID 1772 wrote to memory of 4632	1772	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\java.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:1772
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\java.js
  2⤵
  - Creates scheduled task(s)
  PID:4632