Malware Analysis Report

2025-05-28 15:55

Sample ID 220926-w4cs6abfe8
Target Purchase Order____________pdf.js
SHA256 a1aa91a1ae489d8be807999d3b7a8bc8b10794063d763d06667384ae6152e720
Tags
vjw0rm 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

a1aa91a1ae489d8be807999d3b7a8bc8b10794063d763d06667384ae6152e720

Threat Level: Known bad

The file Purchase Order____________pdf.js was found to be: Known bad.

Malicious Activity Summary

vjw0rm trojan worm

Vjw0rm

Blocklisted process makes network request

Drops startup file

Checks computer location settings

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Modifies registry class

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-09-26 18:28

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-09-26 18:28

Reported

2022-09-26 18:30

Platform

win7-20220812-en

Max time kernel

131s

Max time network

151s

Command Line

wscript.exe "C:\Users\Admin\AppData\Local\Temp\Purchase Order____________pdf.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
N/A N/A C:\Windows\System32\WScript.exe N/A
N/A N/A C:\Windows\System32\WScript.exe N/A
N/A N/A C:\Windows\System32\WScript.exe N/A
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\nbrkkMGeYq.js C:\Windows\System32\WScript.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrkkMGeYq.js C:\Windows\System32\WScript.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files\Java\jre7\bin\javaw.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1500 wrote to memory of 996 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\WScript.exe
PID 1500 wrote to memory of 996 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\WScript.exe
PID 1500 wrote to memory of 996 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\WScript.exe
PID 1500 wrote to memory of 1376 N/A C:\Windows\system32\wscript.exe C:\Program Files\Java\jre7\bin\javaw.exe
PID 1500 wrote to memory of 1376 N/A C:\Windows\system32\wscript.exe C:\Program Files\Java\jre7\bin\javaw.exe
PID 1500 wrote to memory of 1376 N/A C:\Windows\system32\wscript.exe C:\Program Files\Java\jre7\bin\javaw.exe

Processes

C:\Windows\system32\wscript.exe

wscript.exe "C:\Users\Admin\AppData\Local\Temp\Purchase Order____________pdf.js"

C:\Windows\System32\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\nbrkkMGeYq.js"

C:\Program Files\Java\jre7\bin\javaw.exe

"C:\Program Files\Java\jre7\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\mvhrqdkvhn.txt"

Network

Country Destination Domain Proto
US 8.8.8.8:53 javaautorun.duia.ro udp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp
US 8.8.8.8:53 southpowerdiesels.line.pm udp
US 163.123.142.192:5098 southpowerdiesels.line.pm tcp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp

Files

memory/1500-54-0x000007FEFBF71000-0x000007FEFBF73000-memory.dmp

memory/996-55-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\nbrkkMGeYq.js

MD5 a9238779333b1aea96970177b647723b
SHA1 8f5ee4d7b77ff3b00473ed0acbf33fe7c72f3b76
SHA256 9575923c7e3fe773ed3a5a0e9527d14d7e0ac80f57ea817cd079b392191e81b3
SHA512 825127d06be4413db342e968b24d73c2bd552eca3a3a87489b0f4bc53d02ccfa0bf0a9fff42b2d87295ac629e598eec7d47dfb618daedad877710bd8719b4674

memory/1376-57-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\mvhrqdkvhn.txt

MD5 df91a24b4385f63e96878f62cc9257a0
SHA1 e91ccdbb6122256b89b652ab65dc2d3411f442c4
SHA256 11a49b8ff72f776e7565eba69e17ae09bee0aa51dd7c66ae6874bed08f2f6e08
SHA512 179b4886ccbb6ecbbb9fa54c2516709d44cb5f1a710369321b615c22ecc4a7b4101119063654060243a742b4a5605d5dce994d10076802cd3089399eaf44b090

memory/1376-70-0x0000000002090000-0x0000000005090000-memory.dmp

memory/1376-74-0x0000000001D20000-0x0000000001D2A000-memory.dmp

memory/1376-75-0x0000000001D20000-0x0000000001D2A000-memory.dmp

memory/1376-76-0x0000000002090000-0x0000000005090000-memory.dmp

memory/1376-77-0x0000000001D20000-0x0000000001D2A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-09-26 18:28

Reported

2022-09-26 18:30

Platform

win10v2004-20220901-en

Max time kernel

149s

Max time network

153s

Command Line

wscript.exe "C:\Users\Admin\AppData\Local\Temp\Purchase Order____________pdf.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
N/A N/A C:\Windows\System32\WScript.exe N/A
N/A N/A C:\Windows\System32\WScript.exe N/A
N/A N/A C:\Windows\System32\WScript.exe N/A
N/A N/A C:\Windows\System32\WScript.exe N/A
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-1-5-21-929662420-1054238289-2961194603-1000\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\nbrkkMGeYq.js C:\Windows\System32\WScript.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrkkMGeYq.js C:\Windows\System32\WScript.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000_Classes\Local Settings C:\Windows\system32\wscript.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 5024 wrote to memory of 4660 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\WScript.exe
PID 5024 wrote to memory of 4660 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\WScript.exe
PID 5024 wrote to memory of 856 N/A C:\Windows\system32\wscript.exe C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe
PID 5024 wrote to memory of 856 N/A C:\Windows\system32\wscript.exe C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe

Processes

C:\Windows\system32\wscript.exe

wscript.exe "C:\Users\Admin\AppData\Local\Temp\Purchase Order____________pdf.js"

C:\Windows\System32\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\nbrkkMGeYq.js"

C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe

"C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\uvuegptgct.txt"

Network

Country Destination Domain Proto
US 8.8.8.8:53 javaautorun.duia.ro udp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp
US 93.184.221.240:80 tcp
NL 104.80.225.205:443 tcp
US 8.8.8.8:53 southpowerdiesels.line.pm udp
US 163.123.142.192:5098 southpowerdiesels.line.pm tcp
GB 51.132.193.104:443 tcp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp
NG 41.217.38.90:5433 javaautorun.duia.ro tcp

Files

memory/4660-135-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\nbrkkMGeYq.js

MD5 a9238779333b1aea96970177b647723b
SHA1 8f5ee4d7b77ff3b00473ed0acbf33fe7c72f3b76
SHA256 9575923c7e3fe773ed3a5a0e9527d14d7e0ac80f57ea817cd079b392191e81b3
SHA512 825127d06be4413db342e968b24d73c2bd552eca3a3a87489b0f4bc53d02ccfa0bf0a9fff42b2d87295ac629e598eec7d47dfb618daedad877710bd8719b4674

memory/856-137-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\uvuegptgct.txt

MD5 df91a24b4385f63e96878f62cc9257a0
SHA1 e91ccdbb6122256b89b652ab65dc2d3411f442c4
SHA256 11a49b8ff72f776e7565eba69e17ae09bee0aa51dd7c66ae6874bed08f2f6e08
SHA512 179b4886ccbb6ecbbb9fa54c2516709d44cb5f1a710369321b615c22ecc4a7b4101119063654060243a742b4a5605d5dce994d10076802cd3089399eaf44b090

memory/856-146-0x00000000029F0000-0x00000000039F0000-memory.dmp

memory/856-150-0x00000000029F0000-0x00000000039F0000-memory.dmp

memory/856-151-0x00000000029F0000-0x00000000039F0000-memory.dmp

memory/856-153-0x00000000029F0000-0x00000000039F0000-memory.dmp

memory/856-154-0x00000000029F0000-0x00000000039F0000-memory.dmp