Malware Analysis Report

2025-06-16 01:18

Sample ID 231205-z3kddsga58
Target $R5S8JK8.exe
SHA256 1d6f6da9c17573fb0ecd777294181a20c7cdb5c077a648334873808c91887cb8
Tags
remotehost remcos
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: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1d6f6da9c17573fb0ecd777294181a20c7cdb5c077a648334873808c91887cb8

Threat Level: Known bad

The file $R5S8JK8.exe was found to be: Known bad.

Malicious Activity Summary

remotehost remcos

Remcos family

Unsigned PE

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-05 21:14

Signatures

Remcos family

remcos

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-05 21:14

Reported

2023-12-05 21:17

Platform

win7-20231023-en

Max time kernel

148s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe"

Signatures

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe

"C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe"

Network

Country Destination Domain Proto
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-05 21:14

Reported

2023-12-05 21:17

Platform

win10-20231023-en

Max time kernel

148s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe"

Signatures

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe

"C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe"

Network

Country Destination Domain Proto
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp
US 8.8.8.8:53 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.0.8.0.8.0.8.0.ip6.arpa udp
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp
US 8.8.8.8:53 90.65.42.20.in-addr.arpa udp
CA 167.114.189.33:2404 tcp

Files

N/A

Analysis: behavioral3

Detonation Overview

Submitted

2023-12-05 21:14

Reported

2023-12-05 21:17

Platform

win10v2004-20231127-en

Max time kernel

160s

Max time network

167s

Command Line

"C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe"

Signatures

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe

"C:\Users\Admin\AppData\Local\Temp\$R5S8JK8.exe"

Network

Country Destination Domain Proto
CA 167.114.189.33:2404 tcp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.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 8.8.8.8:53 226.173.246.72.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 185.77.117.104.in-addr.arpa udp
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp
US 8.8.8.8:53 1.208.79.178.in-addr.arpa udp
CA 167.114.189.33:2404 tcp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
CA 167.114.189.33:2404 tcp
CA 167.114.189.33:2404 tcp
US 8.8.8.8:53 136.71.105.51.in-addr.arpa udp
CA 167.114.189.33:2404 tcp

Files

N/A