Malware Analysis Report

2025-01-02 03:43

Sample ID 240511-bhvrmace21
Target 215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe
SHA256 215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd
Tags
nuevos remcos persistence rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd

Threat Level: Known bad

The file 215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe was found to be: Known bad.

Malicious Activity Summary

nuevos remcos persistence rat

detects Windows exceutables potentially bypassing UAC using eventvwr.exe

Remcos family

Remcos

detects Windows exceutables potentially bypassing UAC using eventvwr.exe

Loads dropped DLL

Executes dropped EXE

Checks computer location settings

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Modifies registry class

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-11 01:09

Signatures

Remcos family

remcos

detects Windows exceutables potentially bypassing UAC using eventvwr.exe

Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-11 01:09

Reported

2024-05-11 01:11

Platform

win7-20240221-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe"

Signatures

Remcos

rat remcos

detects Windows exceutables potentially bypassing UAC using eventvwr.exe

Description Indicator Process Target
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\data\notepads.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\"" C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\"" C:\Users\Admin\AppData\Roaming\data\notepads.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\"" C:\Users\Admin\AppData\Roaming\data\notepads.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\"" C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\data\notepads.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2172 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe C:\Windows\SysWOW64\WScript.exe
PID 2172 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe C:\Windows\SysWOW64\WScript.exe
PID 2172 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe C:\Windows\SysWOW64\WScript.exe
PID 2172 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe C:\Windows\SysWOW64\WScript.exe
PID 2492 wrote to memory of 2672 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2492 wrote to memory of 2672 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2492 wrote to memory of 2672 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2492 wrote to memory of 2672 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2672 wrote to memory of 2552 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\data\notepads.exe
PID 2672 wrote to memory of 2552 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\data\notepads.exe
PID 2672 wrote to memory of 2552 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\data\notepads.exe
PID 2672 wrote to memory of 2552 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\data\notepads.exe

Processes

C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe

"C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe"

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\data\notepads.exe"

C:\Users\Admin\AppData\Roaming\data\notepads.exe

C:\Users\Admin\AppData\Roaming\data\notepads.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 nuevosremcs.duckdns.org udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
US 8.8.8.8:53 nuevosremcs.duckdns.org udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
US 8.8.8.8:53 nuevosremcs.duckdns.org udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp

Files

C:\Users\Admin\AppData\Local\Temp\install.vbs

MD5 1653e8468b0d0cd87a484261da3a898b
SHA1 ab798bd56e8dfebf82b4feda4e1549778d19848b
SHA256 1bf4eaa1b06f079565ca6ea81082736efd1e25d6465c353ad992ba8c38940c3f
SHA512 5df77f64350879e22a6b9f018bdd8fcf90920cc9f4026ed9bf733b5e965214abd8c3643b211b2f814cd2a9e016f0c15762eaee133feef6ed5c37bdd66ff7be2f

\Users\Admin\AppData\Roaming\data\notepads.exe

MD5 27bb3968cc18fb0df5b14e6d1b805552
SHA1 8f44161a7c4e45422a5d179fbd1d1a81657d828c
SHA256 215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd
SHA512 c470ab75ae46a7161886b8e334143d373385efeb63afcb6f80317bcc0ed989bd3fbc97e87287a0aed8a4661b72261e1ceb94a2be263f25f00c935bad56bafc5d

C:\ProgramData\notas\logs.dat

MD5 81f6e26b375b8077152da55569eb0606
SHA1 799a2db4ebc27c3b700e3f5557a183ff3f86fd4b
SHA256 20d546c390b089c10492d2d0f897d2c7f4524df811befb00fda5ab6baf8849f5
SHA512 22737f7d86969089686f3533129dad927bd2169bc68c02d8f351b25658bdf7f793fa7fe0390fad5e77e532d577f3f4c006fe0445c855d1b4c71b2252e515c9ab

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-11 01:09

Reported

2024-05-11 01:11

Platform

win10v2004-20240426-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe"

Signatures

Remcos

rat remcos

detects Windows exceutables potentially bypassing UAC using eventvwr.exe

Description Indicator Process Target
N/A N/A N/A N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation C:\Windows\SysWOW64\WScript.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\data\notepads.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\"" C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\"" C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\"" C:\Users\Admin\AppData\Roaming\data\notepads.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\"" C:\Users\Admin\AppData\Roaming\data\notepads.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000_Classes\Local Settings C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\data\notepads.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe

"C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe"

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\data\notepads.exe"

C:\Users\Admin\AppData\Roaming\data\notepads.exe

C:\Users\Admin\AppData\Roaming\data\notepads.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 nuevosremcs.duckdns.org udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
BE 88.221.83.242:443 www.bing.com tcp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
BE 88.221.83.242:443 www.bing.com tcp
US 8.8.8.8:53 242.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
US 8.8.8.8:53 nuevosremcs.duckdns.org udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
US 8.8.8.8:53 nuevosremcs.duckdns.org udp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp
SE 46.246.80.26:9090 nuevosremcs.duckdns.org tcp

Files

C:\Users\Admin\AppData\Local\Temp\install.vbs

MD5 1653e8468b0d0cd87a484261da3a898b
SHA1 ab798bd56e8dfebf82b4feda4e1549778d19848b
SHA256 1bf4eaa1b06f079565ca6ea81082736efd1e25d6465c353ad992ba8c38940c3f
SHA512 5df77f64350879e22a6b9f018bdd8fcf90920cc9f4026ed9bf733b5e965214abd8c3643b211b2f814cd2a9e016f0c15762eaee133feef6ed5c37bdd66ff7be2f

C:\Users\Admin\AppData\Roaming\data\notepads.exe

MD5 27bb3968cc18fb0df5b14e6d1b805552
SHA1 8f44161a7c4e45422a5d179fbd1d1a81657d828c
SHA256 215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd
SHA512 c470ab75ae46a7161886b8e334143d373385efeb63afcb6f80317bcc0ed989bd3fbc97e87287a0aed8a4661b72261e1ceb94a2be263f25f00c935bad56bafc5d

C:\ProgramData\notas\logs.dat

MD5 5786ba34986eb9de317b176b6fcad734
SHA1 050537c5578d024f8ea465a000f9298da9c5aa67
SHA256 8a92f26fec184a1ba22d5bff37af84e2f05da49363386995297d252b290b6593
SHA512 0e42aa11db27dd971acf0574d87a632e213840d1817186211b89bc0459a212bb5e8d2df584af9495fb50e5ba8134d19d81af05d4addda6c714c60424c23a20b7