vjw0rm | 1f9052ca261408f12934901fd1a8dd843138a8a7605a5aa1515374fa473b6153

Analysis

max time kernel
142s
max time network
145s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
26/12/2023, 02:01

Target
PO_00124563.js
Size 3KB
Sample231226-cf2b3afgf5
SHA256 8f75fa05aebed182cf2bf13cfe8b26720a76d1328fcfeb6eb2b25d65d0f3f6a2
MD5 84f3ed3670d569603a669686ec959f29
SHA1 2ffc746cff0df8052944f69e57ce28badb8f8549
SHA512 61245362e1a6840501d8c3859171cc32bf80784b387d0965e80b85cd72a56b73276324c6565298fd881c9a0605645d30a23aaface0d5191941daa0a4f636b423
MD5 SHA1 SHA512

Score

10^/10

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm 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\PO_00124563.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO_00124563.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-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\V3MC6BTMP1 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PO_00124563.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
3068	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 3068	1936	wscript.exe	29
PID 1936 wrote to memory of 3068	1936	wscript.exe	29
PID 1936 wrote to memory of 3068	1936	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\PO_00124563.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\PO_00124563.js
  2⤵
  - Creates scheduled task(s)
  PID:3068