Malware Analysis Report

2024-11-15 08:04

Sample ID 230227-1bx1vafe8x
Target upsver.js
SHA256 3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7
Tags
vjw0rm persistence trojan worm
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7

Threat Level: Known bad

The file upsver.js was found to be: Known bad.

Malicious Activity Summary

vjw0rm persistence trojan worm

Vjw0rm

Blocklisted process makes network request

Checks computer location settings

Drops startup file

Adds Run key to start application

Enumerates physical storage devices

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-02-27 21:29

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-02-27 21:29

Reported

2023-02-27 21:31

Platform

win7-20230220-en

Max time kernel

145s

Max time network

152s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\upsver.js

Signatures

Vjw0rm

trojan worm vjw0rm

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\system32\wscript.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\upsver.js C:\Windows\system32\wscript.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\upsver.js C:\Windows\system32\wscript.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run C:\Windows\system32\wscript.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run\QFBMGXAUBF = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\upsver.js'" C:\Windows\system32\wscript.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1304 wrote to memory of 1140 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe
PID 1304 wrote to memory of 1140 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe
PID 1304 wrote to memory of 1140 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\upsver.js

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\upsver.js

Network

Country Destination Domain Proto
US 66.154.102.135:9909 66.154.102.135 tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-02-27 21:29

Reported

2023-02-27 21:31

Platform

win10v2004-20230220-en

Max time kernel

150s

Max time network

154s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\upsver.js

Signatures

Vjw0rm

trojan worm vjw0rm

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\system32\wscript.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation C:\Windows\system32\wscript.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\upsver.js C:\Windows\system32\wscript.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\upsver.js C:\Windows\system32\wscript.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Windows\CurrentVersion\Run C:\Windows\system32\wscript.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\QFBMGXAUBF = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\upsver.js'" C:\Windows\system32\wscript.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 220 wrote to memory of 644 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe
PID 220 wrote to memory of 644 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\upsver.js

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\upsver.js

Network

Country Destination Domain Proto
NL 88.221.25.155:80 tcp
US 66.154.102.135:9909 66.154.102.135 tcp
US 8.8.8.8:53 135.102.154.66.in-addr.arpa udp
US 8.8.8.8:53 210.81.184.52.in-addr.arpa udp
US 8.8.8.8:53 44.8.109.52.in-addr.arpa udp
NL 87.248.202.1:80 tcp
NL 87.248.202.1:80 tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 204.79.197.203:80 tcp
US 8.8.8.8:53 161.252.72.23.in-addr.arpa udp

Files

N/A