vjw0rm | 639a52ac0f48d8f50087a000045ca96697b82bac64354c24e943d05adf382f54

Analysis

max time kernel
141s
max time network
145s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26-12-2024 18:28

Target

#YNOO1.js
Size

16KB
MD5

a1a3e5dae77dc6f0583baa8aba265e15
SHA1

336a077a4bb9bd5256326d8499da778fa96ff253
SHA256

293873306a36a941044538e83294552b6bb9ec7519be1c3d0f022b7e1eac204a
SHA512

4924c89011c4871954f0fb816a16618039a94ffcbd5111eddf8a9b3aac0bf53d7a35f3dd737843c50bb91c3f282318c69ea0edeff18c0227abd08146b01830b7
SSDEEP

384:a0TC7OYDDI5OGyiHThWgdJ/+rVLR3HDVsp:ZKDozhWOJWrxRhsp

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 opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\#YNOO1.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\#YNOO1.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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\PU6BS6WNLD = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\#YNOO1.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
2812	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1716 wrote to memory of 2812	1716	wscript.exe	29
PID 1716 wrote to memory of 2812	1716	wscript.exe	29
PID 1716 wrote to memory of 2812	1716	wscript.exe	29

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\#YNOO1.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1716
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\#YNOO1.js
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2812