Malware Analysis Report

2024-11-15 08:04

Sample ID 230223-bsrsqaed22
Target 6133488aa55c35b2b8f8f5e987f2ce27.bin
SHA256 79ff771e28d6674342f024783884618694ceecbabc22c2740470e86ac66654b1
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

79ff771e28d6674342f024783884618694ceecbabc22c2740470e86ac66654b1

Threat Level: Known bad

The file 6133488aa55c35b2b8f8f5e987f2ce27.bin was found to be: Known bad.

Malicious Activity Summary

vjw0rm persistence trojan worm

Vjw0rm

Blocklisted process makes network request

Drops startup file

Checks computer location settings

Adds Run key to start application

Enumerates physical storage devices

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-02-23 01:24

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-02-23 01:24

Reported

2023-02-23 01:27

Platform

win7-20230220-en

Max time kernel

142s

Max time network

150s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.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 opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.js C:\Windows\system32\wscript.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.js C:\Windows\system32\wscript.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows\CurrentVersion\Run\W56OZZRQKW = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.js\"" C:\Windows\system32\wscript.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows\CurrentVersion\Run 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 1888 wrote to memory of 568 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe
PID 1888 wrote to memory of 568 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe
PID 1888 wrote to memory of 568 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\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.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\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.js

Network

Country Destination Domain Proto
US 8.8.8.8:53 jamnnd.duckdns.org udp
VN 103.156.90.165:8024 jamnnd.duckdns.org tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-02-23 01:24

Reported

2023-02-23 01:27

Platform

win10v2004-20230220-en

Max time kernel

145s

Max time network

151s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.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-1-5-21-1013461898-3711306144-4198452673-1000\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\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.js C:\Windows\system32\wscript.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.js C:\Windows\system32\wscript.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows\CurrentVersion\Run C:\Windows\system32\wscript.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\W56OZZRQKW = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.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 2116 wrote to memory of 2500 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe
PID 2116 wrote to memory of 2500 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\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.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\b3c5a0a3ac206fafac0c872021eb6b540942f301c72b2e09ad48d2e1c6ee679e.js

Network

Country Destination Domain Proto
US 8.8.8.8:53 jamnnd.duckdns.org udp
VN 103.156.90.165:8024 jamnnd.duckdns.org tcp
US 8.8.8.8:53 165.90.156.103.in-addr.arpa udp
US 93.184.221.240:80 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 204.79.197.203:80 tcp
US 67.24.33.254:80 tcp
US 67.24.33.254:80 tcp
US 8.8.8.8:53 2.77.109.52.in-addr.arpa udp

Files

N/A