vjw0rm | 23280d742e475a0a00dae2a6ff0686092ccd14f02b292b4be61de7b73b7dcbda

Analysis

max time kernel
143s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
10-09-2023 09:13

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General

Target

paid_invoice1.js
Size

3KB
MD5

2ef952eeb1e0caf443dfee9cbf97f086
SHA1

6226e9e1319a33c523e4634d64478cfef9bf2084
SHA256

23280d742e475a0a00dae2a6ff0686092ccd14f02b292b4be61de7b73b7dcbda
SHA512

72970f2e32009d4973eac334c2955f0ad185d6b7b670a1767e63440bae51c47bb040a9615cfae5d9d92f689a714098e58a77a7661a8a0b9316a7eceec27ce8a3

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://jsgrouplimited.duckdns.org:9614

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 1 IoCs

flow	pid	Process
9	2264	wscript.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\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\paid_invoice1.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\paid_invoice1.js	wscript.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2474409663-2236862430-1045297337-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\LCB3CVF1ON = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\paid_invoice1.js\""	wscript.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{6627FDBB-9530-45A3-9B1A-7E8AC84CE01F}.catalogItem	svchost.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.

persistence

Scheduled Task/Job

T1053

pid	Process
4996	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2264 wrote to memory of 4996	2264	wscript.exe	84
PID 2264 wrote to memory of 4996	2264	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\paid_invoice1.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:2264
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\paid_invoice1.js
  2⤵
  - Creates scheduled task(s)
  PID:4996