vjw0rm | 505998d8cb3f4b56a9551138bac8262da3be7813c05b932ebae7eba9dbadc938

Analysis

max time kernel
119s
max time network
123s
platform
windows10_x64
resource
win10-en-20211014
submitted
06-12-2021 06:46

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General

Target

4988109_Payment_Invoice_Receipt.js
Size

81KB
MD5

f3592ef1ba926bbbe23fd3733d65c4d9
SHA1

d38daa37f82b1da083d88cd5b4d85962b07e1589
SHA256

505998d8cb3f4b56a9551138bac8262da3be7813c05b932ebae7eba9dbadc938
SHA512

638de28505536930c4e78aa3cdfd97cd9580efbfd0bc6b534ab9f715227c563eba6b33068910766253c822c2d799e0ee650426488495274e49377b77e000c14e

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

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

9 860 wscript.exe

flow	pid	process
9	860	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\4988109_Payment_Invoice_Receipt.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\4988109_Payment_Invoice_Receipt.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-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows\CurrentVersion\Run\V84MXTSUBM = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\4988109_Payment_Invoice_Receipt.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

1032 schtasks.exe

pid	process
1032	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 860 wrote to memory of 1032	860	wscript.exe	schtasks.exe
PID 860 wrote to memory of 1032	860	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\4988109_Payment_Invoice_Receipt.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:860
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\4988109_Payment_Invoice_Receipt.js
  2⤵
  - Creates scheduled task(s)
  PID:1032

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

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Downloads

memory/1032-115-0x0000000000000000-mapping.dmp

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