vjw0rm | 6f99bf12062ceef775d487c08e144365581766a83c1db9d77f8e7aec5200b8a5

Analysis

max time kernel
150s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
12-10-2023 10:26

Target

Dekont.js
Size

24KB
MD5

a009678a453e743ca3b705eedbc11da0
SHA1

d0cadeb8a36a4b31d11c6b0e863a7da83c065d12
SHA256

1212ff50fe2a273f343459baeb52dd3c3c52352d253447bfce423d378b8b7d56
SHA512

6aa0d8455bb7db70971886ec80c20648da35ec5ef3c6b80f5b3fefa21156aa21b23ccd6e65f066018dd1f5a45d45a8bcaecd2511ffbea9a734eb0de1292c85f3
SSDEEP

768:w8zez+dgOrfp0rYOaNnWGUkUj/N3uO6O2Qtl:3zez+dgC+rpaRR/CF6O2QX

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-1-5-21-1141987721-3945596982-3297311814-1000\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\Dekont.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-1-5-21-1141987721-3945596982-3297311814-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2RJZ4PQJPY = "\"C:\\Users\\Admin\\AppData\\Roaming\\Dekont.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
5016	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3768 wrote to memory of 5016	3768	wscript.exe	84
PID 3768 wrote to memory of 5016	3768	wscript.exe	84

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\Dekont.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:3768
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Dekont.js
  2⤵
  - Creates scheduled task(s)
  PID:5016