Malware Analysis Report

2024-12-07 03:24

Sample ID 241112-3r92fstcmp
Target 7286ef37a73db5c125ea8d48534916c4.zip
SHA256 47c4b61d6b83792b9ace018c553ba3db14dc063464a85495a2013eef17e7372e
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: 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

47c4b61d6b83792b9ace018c553ba3db14dc063464a85495a2013eef17e7372e

Threat Level: Known bad

The file 7286ef37a73db5c125ea8d48534916c4.zip was found to be: Known bad.

Malicious Activity Summary

remcos dns discovery persistence rat

Remcos

Remcos family

Adds Run key to start application

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-12 23:46

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-12 23:46

Reported

2024-11-12 23:49

Platform

win7-20240903-en

Max time kernel

180s

Max time network

158s

Command Line

"C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\HandyBackupEditorDesigner = "C:\\Users\\Admin\\Music\\HandyBackupDesignUpdater\\HandyBackupVideo.exe" C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.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\CERTIFICADO DE DEPOSITO JUDICIAL.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe

"C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe"

C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe

"C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.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/2500-1-0x000000000046D000-0x0000000000485000-memory.dmp

memory/2500-0-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2500-4-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2500-5-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2500-6-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2500-3-0x0000000000400000-0x000000000083F000-memory.dmp

memory/2500-14-0x0000000000400000-0x000000000083F000-memory.dmp

memory/3000-20-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-17-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-21-0x0000000000400000-0x000000000083F000-memory.dmp

memory/3000-16-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2500-12-0x0000000000400000-0x000000000083F000-memory.dmp

memory/3000-11-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/3000-7-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-22-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-23-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-24-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-25-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/2500-28-0x000000000046D000-0x0000000000485000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 71df0de18cd8920d58a177f944202c92
SHA1 204a2bbe898d2fd9f171b97a537f1e752be38876
SHA256 a8033cd553a0e4f177e5514a1824d974bc9415fcaee685a6e6fba29fdffc960f
SHA512 81c69d33ae1c9a9dd05516810a881ade23b5ab31b010a573b4f76467c6dccca24ce5c63f615bbdf50bce304dc41b23f4bdba6ae61fca84254365792105e8c515

memory/3000-34-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-35-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-42-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-50-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-51-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-66-0x00000000001C0000-0x000000000023F000-memory.dmp

memory/3000-67-0x00000000001C0000-0x000000000023F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-12 23:46

Reported

2024-11-12 23:49

Platform

win10v2004-20241007-en

Max time kernel

177s

Max time network

158s

Command Line

"C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HandyBackupEditorDesigner = "C:\\Users\\Admin\\Music\\HandyBackupDesignUpdater\\HandyBackupVideo.exe" C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.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\CERTIFICADO DE DEPOSITO JUDICIAL.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe

"C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe"

C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe

"C:\Users\Admin\AppData\Local\Temp\CERTIFICADO DE DEPOSITO JUDICIAL.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.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 8.8.8.8:53 239.10.14.179.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.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 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 7.173.189.20.in-addr.arpa udp

Files

memory/4260-0-0x000000000046D000-0x0000000000485000-memory.dmp

memory/4260-3-0x0000000000400000-0x000000000083F000-memory.dmp

memory/4260-4-0x0000000000400000-0x000000000083F000-memory.dmp

memory/4260-10-0x0000000000400000-0x000000000083F000-memory.dmp

memory/4260-8-0x0000000000400000-0x000000000083F000-memory.dmp

memory/3284-12-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-13-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-11-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-7-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4260-6-0x0000000000400000-0x000000000083F000-memory.dmp

memory/4260-5-0x0000000000400000-0x000000000083F000-memory.dmp

memory/4260-1-0x0000000000400000-0x000000000083F000-memory.dmp

memory/3284-16-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-17-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-18-0x0000000000400000-0x000000000083F000-memory.dmp

memory/3284-19-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-20-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-21-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/4260-24-0x000000000046D000-0x0000000000485000-memory.dmp

memory/3284-29-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-30-0x0000000000840000-0x00000000008BF000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 97a6cfdbd75de848d65800030865969f
SHA1 ece08cd8db610aa93572318ec4a075f86b757d02
SHA256 7cc8e2b3a60411414e6866827b911825c519c79bf497393bc98e818cb4ec4705
SHA512 9d12e8bacff84517ac2056497258f865541c04071f27cd0a21ad4701b1e1358ef45a013b8b6f220c9de5be146c584e44d4aa4d48f893d1fdc242820523d5a3a0

memory/3284-37-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-38-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-45-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-46-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-61-0x0000000000840000-0x00000000008BF000-memory.dmp

memory/3284-62-0x0000000000840000-0x00000000008BF000-memory.dmp