vjw0rm | e991bba3a39d36461d64ed184bead6cb4eba71c1d0091d20d304cb80ab7e5ae5

Analysis

max time kernel
142s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231020-en
resource tags

arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system
submitted
23/10/2023, 14:33

Target
23102023_2233_Order_1000213789.PDF.js
Size 24KB
Sample231023-rw77wabb74
SHA256 e991bba3a39d36461d64ed184bead6cb4eba71c1d0091d20d304cb80ab7e5ae5
MD5 1b5fde2efe79bc0ec4d22a1d91760165
SHA1 00aa16c286726482769c0ae381ca0a6f5a4a5209
SHA512 17db34f6848ce5f9be41389b6694fa156badb31c6b7e90840c87a9f32b4f7f9394adea664b8de41185458c2098dd6771ab481cc3313167919943f64f37d960ca
SSDEEP 384:z3YzEX81ndQeyn3mp0QEXvuJSWK7Zv73IMZKrnM52Q0zBtQ3ogtOhHKTAKDS:DYzEXkda3mtEWJXKNTICKPsntyKTJu
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

Family

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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
7	2324	wscript.exe

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-1-5-21-1873812795-1433807462-1429862679-1000\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\23102023_2233_Order_1000213789.PDF.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-1-5-21-1873812795-1433807462-1429862679-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\UQHC8JRDD3 = "\"C:\\Users\\Admin\\AppData\\Roaming\\23102023_2233_Order_1000213789.PDF.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
4400	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 4400	2324	wscript.exe	88
PID 2324 wrote to memory of 4400	2324	wscript.exe	88

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\23102023_2233_Order_1000213789.PDF.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:2324
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\23102023_2233_Order_1000213789.PDF.js
  2⤵
  - Creates scheduled task(s)
  PID:4400