vjw0rm | 9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d

Analysis

max time kernel
144s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-12-2024 21:57

Target

JaffaCakes118_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.js
Size

13KB
MD5

bda43336bf6249a4e667d207d62cc910
SHA1

9dc42b7d9dfd2b3f5a22e71abb0106fdc736bf4a
SHA256

9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d
SHA512

af80aa64ca5d29d5f1839b38330a158507faac2ec305242d94d4c041da65c8b8a8ed8c927e1cd6e1383f1fe1335a814c6d28b1bbc366e3de3d9898478edd1650
SSDEEP

384:jE+DtyRt9W+kdzGQ9FdtDbdP3AwOEIgrtm+7FOSE2:IZ76z3FjpnrFlr

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\JaffaCakes118_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JaffaCakes118_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\ABR5SI7DKX = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\JaffaCakes118_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.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
1060	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1060	1972	wscript.exe	31
PID 1972 wrote to memory of 1060	1972	wscript.exe	31
PID 1972 wrote to memory of 1060	1972	wscript.exe	31

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\JaffaCakes118_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_9b1f2d3e06f9a6299287c531f007e1f2a38fd1d5af3481e7f6be24475495567d.js
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1060