Malware Analysis Report

2024-11-15 08:04

Sample ID 230301-b8jgaaeb23
Target cf8263bd95c97a1b5e3932134a9172c5.bin
SHA256 81b9f8cbef011f498682a359eb362e8ba25fb5cb18a7c6197d5ea22a05ffde04
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

81b9f8cbef011f498682a359eb362e8ba25fb5cb18a7c6197d5ea22a05ffde04

Threat Level: Known bad

The file cf8263bd95c97a1b5e3932134a9172c5.bin 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

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Creates scheduled task(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-03-01 01:48

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-03-01 01:48

Reported

2023-03-01 01:51

Platform

win7-20230220-en

Max time kernel

142s

Max time network

154s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.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\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js C:\Windows\system32\wscript.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js C:\Windows\system32\wscript.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Windows\CurrentVersion\Run C:\Windows\system32\wscript.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Windows\CurrentVersion\Run\QFBMGXAUBF = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.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 1712 wrote to memory of 540 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe
PID 1712 wrote to memory of 540 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe
PID 1712 wrote to memory of 540 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\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.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\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.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

2023-03-01 01:48

Reported

2023-03-01 01:51

Platform

win10v2004-20230220-en

Max time kernel

145s

Max time network

153s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.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-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation 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\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js C:\Windows\system32\wscript.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js C:\Windows\system32\wscript.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows\CurrentVersion\Run C:\Windows\system32\wscript.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\QFBMGXAUBF = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.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 2280 wrote to memory of 3992 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\schtasks.exe
PID 2280 wrote to memory of 3992 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\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.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\3e61b1cfc096af4b8b8371daaf4f233af9d00286232d16159b3ce77a17f3dba7.js

Network

Country Destination Domain Proto
US 66.154.102.135:9909 66.154.102.135 tcp
US 209.197.3.8:80 tcp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 135.102.154.66.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 210.81.184.52.in-addr.arpa udp
US 8.8.8.8:53 202.74.101.95.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 209.197.3.8:80 tcp
GB 51.105.71.137:443 tcp
US 8.8.8.8:53 176.122.125.40.in-addr.arpa udp
US 8.8.8.8:53 44.8.109.52.in-addr.arpa udp

Files

N/A