Malware Analysis Report

2025-05-05 21:52

Sample ID 221012-ql9saadfcj
Target PO-0452.pdf.js
SHA256 99d5f2394b1ba576d9e82ac5951d1108fe41e631ca5fd2de15837c733296b71c
Tags
remcos vjw0rm remotehost rat 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

99d5f2394b1ba576d9e82ac5951d1108fe41e631ca5fd2de15837c733296b71c

Threat Level: Known bad

The file PO-0452.pdf.js was found to be: Known bad.

Malicious Activity Summary

remcos vjw0rm remotehost rat trojan worm

Vjw0rm

Remcos

Blocklisted process makes network request

Executes dropped EXE

Drops startup file

Checks computer location settings

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-10-12 13:22

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-12 13:22

Reported

2022-10-12 13:24

Platform

win7-20220812-en

Max time kernel

148s

Max time network

140s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\PO-0452.pdf.js

Signatures

Remcos

rat remcos

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\remcos_a.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\pQvdcedYEV.js C:\Windows\System32\wscript.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pQvdcedYEV.js C:\Windows\System32\wscript.exe N/A

Enumerates physical storage devices

Processes

C:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\PO-0452.pdf.js

C:\Windows\System32\wscript.exe

"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\pQvdcedYEV.js"

C:\Users\Admin\AppData\Local\Temp\remcos_a.exe

"C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"

Network

Country Destination Domain Proto
NL 185.222.57.147:1989 tcp
US 8.8.8.8:53 javaautorun.duia.ro udp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp
NL 185.222.57.147:1989 tcp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp

Files

memory/1688-54-0x000007FEFB6A1000-0x000007FEFB6A3000-memory.dmp

memory/1272-55-0x0000000000000000-mapping.dmp

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

MD5 8c08d9c28569d6d222a76c39ef6dbd2c
SHA1 96c8240b6650b29cacb7abfcefc6defa913ad5c2
SHA256 eb490702fcfcaa7ca28fe5037f7177c052c9617cf863333e3b9bade5a7e6596e
SHA512 67e5ab76a58bc953c513204e4767afb68eb73ced347c08d77b37c55c9ba3b7c3ad529e50ba59825459e161ea7fdfd6242326deea0fcd31f30fc2e30f498f22db

memory/2044-57-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\remcos_a.exe

MD5 14ea8e66c295e1883924c5a685123069
SHA1 b1dc4b5dd08c3c055066b10c119bd390747994f2
SHA256 dc402d0bbdb1edac28207a6a9b6cbae698bb0b6cf6efe41bda4362c3a10d6915
SHA512 c2baca8d5b9438bf061fb9581b6275870a4f6193b8632112e129362e478963ca610692615defad1e55586fd955ce293ab3ecf7408ea7566c7213387ab5b46009

memory/2044-59-0x0000000075601000-0x0000000075603000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-12 13:22

Reported

2022-10-12 13:24

Platform

win10v2004-20220812-en

Max time kernel

149s

Max time network

152s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\PO-0452.pdf.js

Signatures

Remcos

rat remcos

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\remcos_a.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\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\pQvdcedYEV.js C:\Windows\System32\wscript.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pQvdcedYEV.js C:\Windows\System32\wscript.exe N/A

Enumerates physical storage devices

Processes

C:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\PO-0452.pdf.js

C:\Windows\System32\wscript.exe

"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\pQvdcedYEV.js"

C:\Users\Admin\AppData\Local\Temp\remcos_a.exe

"C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"

Network

Country Destination Domain Proto
US 8.247.210.254:80 tcp
US 8.247.210.254:80 tcp
US 8.247.210.254:80 tcp
US 8.8.8.8:53 javaautorun.duia.ro udp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp
NL 185.222.57.147:1989 tcp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp
IE 52.109.77.0:443 tcp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp
NL 185.222.57.147:1989 tcp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp
US 8.247.210.254:80 tcp
NL 185.222.57.147:1989 tcp
NG 41.217.29.135:5465 javaautorun.duia.ro tcp

Files

memory/3972-132-0x0000000000000000-mapping.dmp

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

MD5 8c08d9c28569d6d222a76c39ef6dbd2c
SHA1 96c8240b6650b29cacb7abfcefc6defa913ad5c2
SHA256 eb490702fcfcaa7ca28fe5037f7177c052c9617cf863333e3b9bade5a7e6596e
SHA512 67e5ab76a58bc953c513204e4767afb68eb73ced347c08d77b37c55c9ba3b7c3ad529e50ba59825459e161ea7fdfd6242326deea0fcd31f30fc2e30f498f22db

memory/1252-134-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\remcos_a.exe

MD5 14ea8e66c295e1883924c5a685123069
SHA1 b1dc4b5dd08c3c055066b10c119bd390747994f2
SHA256 dc402d0bbdb1edac28207a6a9b6cbae698bb0b6cf6efe41bda4362c3a10d6915
SHA512 c2baca8d5b9438bf061fb9581b6275870a4f6193b8632112e129362e478963ca610692615defad1e55586fd955ce293ab3ecf7408ea7566c7213387ab5b46009

C:\Users\Admin\AppData\Local\Temp\remcos_a.exe

MD5 14ea8e66c295e1883924c5a685123069
SHA1 b1dc4b5dd08c3c055066b10c119bd390747994f2
SHA256 dc402d0bbdb1edac28207a6a9b6cbae698bb0b6cf6efe41bda4362c3a10d6915
SHA512 c2baca8d5b9438bf061fb9581b6275870a4f6193b8632112e129362e478963ca610692615defad1e55586fd955ce293ab3ecf7408ea7566c7213387ab5b46009