vjw0rm | 43ef5813821769bf44ecc1036275ccd12c04901914bd0b64e967f736579ee0f2

Analysis

max time kernel
142s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03-04-2024 00:06

Target

G47C4A2M39G.js
Size

81KB
MD5

74229d35e52cb89fa859f397a55cf590
SHA1

dea9ff00836eb970524a2ea0ae20b24990b918ad
SHA256

875e7fd7d02db4e381cd7facd6ab1f6b5e643e12ecf76bfccdf431ef6169a448
SHA512

22f25fca1ff5325586be6e9c854fbc32b103f502a5d003f3c5fe0ef9739da0f6dcb931c5ecc6f51e1008c092b726d35545ff575e9ea0d21ccb88b70a55af27fc
SSDEEP

192:/jTKDrSsWruBc3N19erDL1ow9yQ9y9JkLE6+61Wsz+fr+5inP7TvsC+U6OEsO+oU:rTvPi/vmw4R/4K/Ktg

Score

10^/10

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
Blocklisted process makes network request 6 IoCs

Processes:

wscript.exe

flow pid process

4 1396 wscript.exe
8 1396 wscript.exe
9 1396 wscript.exe
11 1396 wscript.exe
12 1396 wscript.exe
13 1396 wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\G47C4A2M39G.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\G47C4A2M39G.js	wscript.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

Processes:

wscript.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000\Software\Microsoft\Windows\CurrentVersion\Run\JC4G62HNZ6 = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\G47C4A2M39G.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.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

2660 schtasks.exe

pid	process
2660	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1396 wrote to memory of 2660	1396	wscript.exe	schtasks.exe
PID 1396 wrote to memory of 2660	1396	wscript.exe	schtasks.exe
PID 1396 wrote to memory of 2660	1396	wscript.exe	schtasks.exe

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\G47C4A2M39G.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1396
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\G47C4A2M39G.js
  2⤵
  - Creates scheduled task(s)
  PID:2660