Malware Analysis Report

2024-12-07 22:20

Sample ID 240810-kcg31sscmq
Target remcos_a.exe
SHA256 2cca27a1d50a61f43ca12e55cbc3c2895b24d55ec0bd4adca2bd3c3b293b5f14
Tags
remotehost remcos discovery
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

2cca27a1d50a61f43ca12e55cbc3c2895b24d55ec0bd4adca2bd3c3b293b5f14

Threat Level: Known bad

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

Malicious Activity Summary

remotehost remcos discovery

Remcos family

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-10 08:27

Signatures

Remcos family

remcos

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-10 08:27

Reported

2024-08-10 08:29

Platform

win7-20240705-en

Max time kernel

147s

Max time network

142s

Command Line

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

Signatures

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\remcos_a.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Processes

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

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

Network

Country Destination Domain Proto
US 216.230.18.127:2404 tcp
US 216.230.18.127:2404 tcp
US 216.230.18.127:2404 tcp
US 216.230.18.127:2404 tcp
US 216.230.18.127:2404 tcp
US 216.230.18.127:2404 tcp
US 216.230.18.127:2404 tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-10 08:27

Reported

2024-08-10 08:29

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

142s

Command Line

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

Signatures

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\remcos_a.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Processes

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

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

Network

Country Destination Domain Proto
US 216.230.18.127:2404 tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 216.230.18.127:2404 tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 216.230.18.127:2404 tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 216.230.18.127:2404 tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 216.230.18.127:2404 tcp

Files

N/A