vjw0rm | b4f807b7920de8cc93fa57c5b9a26126e5750bc65b87b5f68b8d77ecf31e7d64

Analysis

max time kernel
146s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
15-12-2024 13:38

Target

W091.js
Size

12KB
MD5

173fd53dae86a5a6b7c4af3e08c06539
SHA1

601f17247f330e78776eaa58fbd6fa1a3fbdf9f8
SHA256

c3e72d149e6ee949a7118dec62a17b6a8513d244cf593381fbaca3890f64e6d7
SHA512

a6af8383cfe37f27881573898aca705d1bbdc900da5ac42507ece882a08c6fdd4b48d295d9906def91bf4938c8a96411a64199a651f8bdf26927841694436cbc
SSDEEP

192:eqU0WY8BPwheQw5Imv/494dWS++I8SeGru5RPZ3HPLCi6KJIwG7ZZSJy:eqUVfBPwhUGK/665GSNvL/yTvSJy

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

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\W091.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\W091.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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\O3FNWNFPWY = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\W091.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
3044	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2336 wrote to memory of 3044	2336	wscript.exe	31
PID 2336 wrote to memory of 3044	2336	wscript.exe	31
PID 2336 wrote to memory of 3044	2336	wscript.exe	31

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\W091.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2336
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\W091.js
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3044