vjw0rm | 5d7a0823b291315c81e35ed0c7ca7c81c6595c7ca9e5ebf0f56993a02d77c1f2

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06-01-2025 20:38

Target

JaffaCakes118_395f205e2eb958f80f72f13cff9303e2.js
Size

10KB
MD5

395f205e2eb958f80f72f13cff9303e2
SHA1

d7929d3bc0326abaa776d55b74150c42790634b9
SHA256

5d7a0823b291315c81e35ed0c7ca7c81c6595c7ca9e5ebf0f56993a02d77c1f2
SHA512

5e35600f9b4789ff0869d0d28898421121b25eb409646c1fc6794ebcf59c6d9adf742ccb266ef7d9ddf420743995236bc8a1d42a8a06dd90d5fb865662007e7e
SSDEEP

192:Nv7au56Eore0U4PpvsCq54jCPkEOnxyP+Qnzac7P8kdC0lTkmtteFE:N+u5xJsPpvbFRXnAWQn+30NLaFE

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

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-1-5-21-4089630652-1596403869-279772308-1000\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\JaffaCakes118_395f205e2eb958f80f72f13cff9303e2.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JaffaCakes118_395f205e2eb958f80f72f13cff9303e2.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\F4ZGVI2L3S = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\JaffaCakes118_395f205e2eb958f80f72f13cff9303e2.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
5036	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1948 wrote to memory of 5036	1948	wscript.exe	83
PID 1948 wrote to memory of 5036	1948	wscript.exe	83

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_395f205e2eb958f80f72f13cff9303e2.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:1948
- 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_395f205e2eb958f80f72f13cff9303e2.js
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5036