vjw0rm | 81b6fe197e9493963fd3e66ebae93ee92f586bd9bd8fa275e3ea0e0723975dd2

Analysis

max time kernel
143s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29-03-2024 20:22

Target

2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe
Size

224KB
MD5

2bf8b80d12f72c06d8566797f1829d70
SHA1

37d029aad8531adeeea53cd3a549390c3a913627
SHA256

81b6fe197e9493963fd3e66ebae93ee92f586bd9bd8fa275e3ea0e0723975dd2
SHA512

7579eed96a37747a8b97791b83f1efd410f19d52be0e00a62165ba8c437842c03af63f47fe34a220daaddaa7d0bf42122820da3b16c850e31b49996c2ff0086c
SSDEEP

3072:q8aQs4BSCpikIp8PwzjdIC0fyEixcHw2m45UpXMhv8XWaOKHmv1z0oo0KXDDlxG3:qTDOHnSP9IRfypSsX500oHKXXG+PZMx

Score

10^/10

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

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

System Information Discovery

Processes:

2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe

Drops startup file 2 IoCs

Processes:

2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe	2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe	2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

Processes:

2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\IBQB4T4P1T = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe\""	2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.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

Processes:

schtasks.exe

pid process

2904 schtasks.exe

pid	process
2904	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe

description	pid	process	target process
PID 4600 wrote to memory of 2904	4600	2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe	schtasks.exe
PID 4600 wrote to memory of 2904	4600	2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe	schtasks.exe
PID 4600 wrote to memory of 2904	4600	2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4600
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\2bf8b80d12f72c06d8566797f1829d70_JaffaCakes118.exe
  2⤵
  - Creates scheduled task(s)
  PID:2904