vjw0rm | a1ee2ea563a62ce42f154749f225613c13b6c5568a0e4d955a2c09895ac1a26e

Analysis

max time kernel
141s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2023 14:26

Target

758a8716e34bdc7cc046fcb9383216d9.js
Size

9KB
MD5

758a8716e34bdc7cc046fcb9383216d9
SHA1

5faac5dd55211b967333205e71b9d934b14e88b5
SHA256

a1ee2ea563a62ce42f154749f225613c13b6c5568a0e4d955a2c09895ac1a26e
SHA512

1fba12f0bc766bcd8ebc3203dd2ef833f0f34f4fd53f435d9f224e97ba450886bb6ecf1aab92cc912a7eaa3e31e100f650a386051438449fcc01f01afa9acbb7
SSDEEP

192:Q26V2Z59QMw8PlV0jwwYMtZ3i9LujB/52g5wip0ii/c6foy4jhRB:QzVs59oFj7P3v2g5zMFfoyIF

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-1-5-21-3803511929-1339359695-2191195476-1000\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\758a8716e34bdc7cc046fcb9383216d9.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\758a8716e34bdc7cc046fcb9383216d9.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-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MX1CAYIRN3 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\758a8716e34bdc7cc046fcb9383216d9.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
3632	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3920 wrote to memory of 3632	3920	wscript.exe	91
PID 3920 wrote to memory of 3632	3920	wscript.exe	91

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\758a8716e34bdc7cc046fcb9383216d9.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:3920
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\758a8716e34bdc7cc046fcb9383216d9.js
  2⤵
  - Creates scheduled task(s)
  PID:3632