Malware Analysis Report

2024-12-07 03:24

Sample ID 241112-2cpxas1qcx
Target ecf21a467481b28d7205f487ddac7f81.zip
SHA256 7370a55c5064125019b2c807f85c25ccf71cbdbdd639bfce7cd507ce15e7ae39
Tags
remcos dns discovery persistence rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

7370a55c5064125019b2c807f85c25ccf71cbdbdd639bfce7cd507ce15e7ae39

Threat Level: Known bad

The file ecf21a467481b28d7205f487ddac7f81.zip was found to be: Known bad.

Malicious Activity Summary

remcos dns discovery persistence rat

Remcos

Remcos family

Adds Run key to start application

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-12 22:26

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-12 22:26

Reported

2024-11-12 22:29

Platform

win10v2004-20241007-en

Max time kernel

180s

Max time network

160s

Command Line

"C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe"

Signatures

Remcos

rat remcos

Remcos family

remcos

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HandyBackupEditorDesigner = "C:\\Users\\Admin\\Music\\HandyBackupDesignUpdater\\HandyBackupVideo.exe" C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe

"C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe"

C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe

"C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 LUNAPETRO.chickenkiller.com udp
CO 179.14.10.239:1991 LUNAPETRO.chickenkiller.com tcp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 239.10.14.179.in-addr.arpa udp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 224.162.46.104.in-addr.arpa udp

Files

memory/1044-1-0x000000000046D000-0x0000000000485000-memory.dmp

memory/1044-0-0x0000000000400000-0x000000000083F000-memory.dmp

memory/1044-3-0x0000000000400000-0x000000000083F000-memory.dmp

memory/1044-6-0x0000000000400000-0x000000000083F000-memory.dmp

memory/1044-5-0x0000000000400000-0x000000000083F000-memory.dmp

memory/1044-8-0x0000000000400000-0x000000000083F000-memory.dmp

memory/4080-11-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/1044-10-0x0000000000400000-0x000000000083F000-memory.dmp

memory/4080-12-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-16-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-13-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-7-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/1044-2-0x0000000000400000-0x000000000083F000-memory.dmp

memory/4080-17-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-18-0x0000000000400000-0x000000000083F000-memory.dmp

memory/4080-20-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-19-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-21-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/1044-24-0x000000000046D000-0x0000000000485000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 bcb8a23b5a8a2ef5ee1f4491cce0d658
SHA1 930c5e97f56a620827d0a77be82911358911db0c
SHA256 9455e0039f2a3ace768ad76a311ecc752762995f5a7c33206560781562f79935
SHA512 6b54cda0cf5f8455e455d20aae43ba1493e4b10478576c00677edaff9ba5bfc5a99de99983e36cf20a56621de2b5b0edc630eaa319f31fe51ece3d3c1ba23cee

memory/4080-30-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-31-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-38-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-46-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-47-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-54-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-55-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-62-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4080-63-0x0000000000840000-0x00000000008BF000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-12 22:26

Reported

2024-11-12 22:29

Platform

win7-20241010-en

Max time kernel

177s

Max time network

160s

Command Line

"C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe"

Signatures

Remcos

rat remcos

Remcos family

remcos

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\HandyBackupEditorDesigner = "C:\\Users\\Admin\\Music\\HandyBackupDesignUpdater\\HandyBackupVideo.exe" C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe

"C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe"

C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe

"C:\Users\Admin\AppData\Local\Temp\COMPROBANTE TRANSFERENCIA PROGRAMADA EXITOSA.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 LUNAPETRO.chickenkiller.com udp
CO 179.14.10.239:1991 LUNAPETRO.chickenkiller.com tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/2112-1-0x000000000046D000-0x0000000000485000-memory.dmp

memory/2112-0-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2112-2-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2112-5-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2112-4-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2112-6-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2112-14-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2112-12-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2916-16-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-21-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2916-20-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-17-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-11-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2916-7-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-22-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-24-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-23-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-25-0x00000000001C0000-0x000000000023F000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 e59bc42f39f78ecee390ec148a7093af
SHA1 5e234df84a2c929a1b9e3368dd355936302ae3e6
SHA256 8e95946efe1fbbecb9b651b793ad440e321ac6929c13bc2eb9d4e8a6974ff1ee
SHA512 f94219c2a579eb17e34b63065f465ed9781ce28ccf2faa7b74c6bf0e6a8c699ee9012a58788ad17638a9bc3c15b1a99f6b87599e20a6b8bcb522a8aebe29332f

memory/2916-33-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-34-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-41-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-49-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-50-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-65-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2916-66-0x00000000001C0000-0x000000000023F000-memory.dmp