Malware Analysis Report

2025-01-02 03:21

Sample ID 240401-fpfnhaef43
Target build.exe
SHA256 02d8a5f3efe1ba3c56878a9c68229d893bb43d22cdfb57a92ac024940286e6cc
Tags
remcos remotehost 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 Overview

score
10/10

SHA256

02d8a5f3efe1ba3c56878a9c68229d893bb43d22cdfb57a92ac024940286e6cc

Threat Level: Known bad

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

Malicious Activity Summary

remcos remotehost rat

Remcos

Unsigned PE

Suspicious use of SetWindowsHookEx

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-01 05:02

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-01 05:02

Reported

2024-04-01 05:02

Platform

win11-20240221-en

Max time kernel

10s

Max time network

12s

Command Line

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

Signatures

Remcos

rat remcos

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 C:\Windows\System32\Taskmgr.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A C:\Windows\System32\Taskmgr.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName C:\Windows\System32\Taskmgr.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\Taskmgr.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Taskmgr.exe N/A
Token: SeCreateGlobalPrivilege N/A C:\Windows\System32\Taskmgr.exe N/A

Suspicious use of SetWindowsHookEx

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

Processes

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

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

C:\Windows\System32\Taskmgr.exe

"C:\Windows\System32\Taskmgr.exe"

Network

Country Destination Domain Proto
NL 78.142.18.109:2401 tcp
NL 78.142.18.109:2401 tcp
NL 78.142.18.109:2401 tcp
NL 78.142.18.109:2401 tcp

Files

memory/3256-0-0x0000000000400000-0x00000000007DE000-memory.dmp

memory/3256-2-0x0000000001060000-0x000000000106A000-memory.dmp

memory/3256-4-0x0000000001060000-0x000000000106A000-memory.dmp

memory/3256-5-0x0000000001070000-0x0000000001077000-memory.dmp

memory/3256-6-0x0000000001070000-0x0000000001077000-memory.dmp

memory/3256-8-0x0000000001080000-0x0000000001084000-memory.dmp

memory/3256-10-0x0000000001080000-0x0000000001084000-memory.dmp

memory/3256-11-0x0000000003AB0000-0x0000000003AC8000-memory.dmp

memory/3256-12-0x0000000003AB0000-0x0000000003AC8000-memory.dmp

memory/3256-13-0x0000000003CA0000-0x0000000003D22000-memory.dmp

memory/3256-14-0x0000000003CA0000-0x0000000003D22000-memory.dmp

memory/3256-16-0x0000000003CA0000-0x0000000003D22000-memory.dmp

memory/3256-17-0x0000000003CA0000-0x0000000003D22000-memory.dmp

memory/3256-18-0x0000000003CA0000-0x0000000003D22000-memory.dmp

memory/3256-19-0x0000000003CA0000-0x0000000003D22000-memory.dmp

memory/3256-20-0x0000000003CA0000-0x0000000003D22000-memory.dmp

memory/752-22-0x000002892AAE0000-0x000002892AAE1000-memory.dmp

memory/752-23-0x000002892AAE0000-0x000002892AAE1000-memory.dmp

memory/752-24-0x000002892AAE0000-0x000002892AAE1000-memory.dmp

memory/752-28-0x000002892AAE0000-0x000002892AAE1000-memory.dmp

memory/752-29-0x000002892AAE0000-0x000002892AAE1000-memory.dmp

memory/752-30-0x000002892AAE0000-0x000002892AAE1000-memory.dmp

memory/752-31-0x000002892AAE0000-0x000002892AAE1000-memory.dmp

memory/752-32-0x000002892AAE0000-0x000002892AAE1000-memory.dmp

memory/752-33-0x000002892AAE0000-0x000002892AAE1000-memory.dmp

memory/752-34-0x000002892AAE0000-0x000002892AAE1000-memory.dmp

memory/3256-35-0x0000000003CA0000-0x0000000003D22000-memory.dmp

memory/3256-36-0x0000000003CA0000-0x0000000003D22000-memory.dmp

memory/3256-37-0x0000000003CA0000-0x0000000003D22000-memory.dmp

memory/3256-38-0x0000000003CA0000-0x0000000003D22000-memory.dmp