vjw0rm | bc01af8053e12e974ed8f7bf2f0e39e7ebb608e9061e506bbeae69e2c9ca309b

Analysis

max time kernel
297s
max time network
301s
platform
windows10_x64
resource
win10-en-20210920
submitted
26-10-2021 15:19

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General

Target

_1ZKS82J.JS
Size

11KB
MD5

57fe2a982978c1e408718062dc779ba1
SHA1

cacff8bc0a97889e5096b6944795ca6eeb916e8f
SHA256

8ffde50491ef1cfc93f417b731186a08fb6c3e5aad21f131a60b87936bd3f850
SHA512

9b921cb1a2fa12ac966f7e724ae38d0410efde4683b1a0dcb5f68204003e7479920d099cce6c9ce96942a52984e315f9ed0c94dcaee9c443691b26da656a6c26

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://gg1592661.duckdns.org:7924

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
Blocklisted process makes network request 1 IoCs

Processes:

WScript.exe

flow pid process

9 3708 WScript.exe

flow	pid	process
9	3708	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\_1ZKS82J.JS	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\_1ZKS82J.JS	WScript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

WScript.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run\F4ZGVI2L3S = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\_1ZKS82J.JS\""	WScript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

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
T1053

Processes:

schtasks.exe

pid process

4056 schtasks.exe

pid	process
4056	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

WScript.exe

description	pid	process	target process
PID 3708 wrote to memory of 4056	3708	WScript.exe	schtasks.exe
PID 3708 wrote to memory of 4056	3708	WScript.exe	schtasks.exe

C:\Windows\System32\WScript.exe
C:\Windows\System32\WScript.exe "C:\Users\Admin\AppData\Local\Temp\_1ZKS82J.JS"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3708

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\_1ZKS82J.JS
2⤵
- Creates scheduled task(s)
PID:4056

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/4056-115-0x0000000000000000-mapping.dmp

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