Malware Analysis Report

2025-01-02 03:36

Sample ID 240509-rbygyagb58
Target 4.exe
SHA256 8e74e39d47f93876716dd58b3aa2d0e009a67354b5eb09a12bdd65ac9a319ba7
Tags
remcos 1218202300 rat upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

8e74e39d47f93876716dd58b3aa2d0e009a67354b5eb09a12bdd65ac9a319ba7

Threat Level: Known bad

The file 4.exe was found to be: Known bad.

Malicious Activity Summary

remcos 1218202300 rat upx

Remcos

UPX packed file

AutoIT Executable

Suspicious use of SetThreadContext

Program crash

Unsigned PE

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-05-09 14:01

Signatures

UPX packed file

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

AutoIT Executable

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
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 14:01

Reported

2024-05-09 14:04

Platform

win7-20240221-en

Max time kernel

148s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4.exe"

Signatures

Remcos

rat remcos

UPX packed file

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

AutoIT Executable

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2856 set thread context of 2340 N/A C:\Users\Admin\AppData\Local\Temp\4.exe C:\Windows\SysWOW64\svchost.exe

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\4.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\4.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2856 wrote to memory of 2340 N/A C:\Users\Admin\AppData\Local\Temp\4.exe C:\Windows\SysWOW64\svchost.exe
PID 2856 wrote to memory of 2340 N/A C:\Users\Admin\AppData\Local\Temp\4.exe C:\Windows\SysWOW64\svchost.exe
PID 2856 wrote to memory of 2340 N/A C:\Users\Admin\AppData\Local\Temp\4.exe C:\Windows\SysWOW64\svchost.exe
PID 2856 wrote to memory of 2340 N/A C:\Users\Admin\AppData\Local\Temp\4.exe C:\Windows\SysWOW64\svchost.exe
PID 2856 wrote to memory of 2340 N/A C:\Users\Admin\AppData\Local\Temp\4.exe C:\Windows\SysWOW64\svchost.exe

Processes

C:\Users\Admin\AppData\Local\Temp\4.exe

"C:\Users\Admin\AppData\Local\Temp\4.exe"

C:\Windows\SysWOW64\svchost.exe

"C:\Users\Admin\AppData\Local\Temp\4.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 softwareupdatexkwre.duckdns.org udp
US 104.223.119.206:45682 softwareupdatexkwre.duckdns.org tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/2856-0-0x0000000000160000-0x0000000000323000-memory.dmp

memory/2856-11-0x00000000000B0000-0x00000000000B4000-memory.dmp

memory/2340-12-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2856-15-0x0000000000160000-0x0000000000323000-memory.dmp

memory/2340-16-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-17-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-18-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-19-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-20-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-21-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-22-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-25-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-26-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-27-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-29-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-28-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-31-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-30-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-32-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2340-33-0x0000000000400000-0x000000000047F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 14:01

Reported

2024-05-09 14:04

Platform

win10v2004-20240426-en

Max time kernel

149s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4.exe"

Signatures

UPX packed file

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

AutoIT Executable

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

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\4.exe

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\4.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\4.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1608 wrote to memory of 3276 N/A C:\Users\Admin\AppData\Local\Temp\4.exe C:\Windows\SysWOW64\svchost.exe
PID 1608 wrote to memory of 3276 N/A C:\Users\Admin\AppData\Local\Temp\4.exe C:\Windows\SysWOW64\svchost.exe
PID 1608 wrote to memory of 3276 N/A C:\Users\Admin\AppData\Local\Temp\4.exe C:\Windows\SysWOW64\svchost.exe

Processes

C:\Users\Admin\AppData\Local\Temp\4.exe

"C:\Users\Admin\AppData\Local\Temp\4.exe"

C:\Windows\SysWOW64\svchost.exe

"C:\Users\Admin\AppData\Local\Temp\4.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1608 -ip 1608

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1608 -s 708

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
BE 2.17.196.75:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
BE 2.17.196.75:443 www.bing.com tcp
US 8.8.8.8:53 75.196.17.2.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 31.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
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
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 88.16.208.104.in-addr.arpa udp

Files

memory/1608-0-0x0000000000A40000-0x0000000000C03000-memory.dmp

memory/1608-11-0x0000000001A60000-0x0000000001A64000-memory.dmp

memory/1608-13-0x0000000000A40000-0x0000000000C03000-memory.dmp