Malware Analysis Report

2025-06-16 01:18

Sample ID 231206-t7jd1afa5x
Target clientfmUx.exe
SHA256 06b9b10a15c0b2856620dd4469c8a976bfbc42e506747a04a763dbeeaf1ecb79
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

06b9b10a15c0b2856620dd4469c8a976bfbc42e506747a04a763dbeeaf1ecb79

Threat Level: Known bad

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

Malicious Activity Summary

remcos remotehost rat

Remcos

Suspicious use of SetThreadContext

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-06 16:44

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-06 16:41

Reported

2023-12-06 16:47

Platform

win7-20231201-en

Max time kernel

120s

Max time network

121s

Command Line

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

Signatures

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of SetWindowsHookEx

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

Processes

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

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

Network

N/A

Files

memory/2076-0-0x0000000000400000-0x0000000000488000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-06 16:41

Reported

2023-12-06 16:47

Platform

win10v2004-20231130-en

Max time kernel

150s

Max time network

150s

Command Line

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

Signatures

Remcos

rat remcos

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3284 set thread context of 4208 N/A C:\Users\Admin\AppData\Local\Temp\clientfmUx.exe C:\Windows\SysWOW64\cmd.exe

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

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

Suspicious behavior: MapViewOfSection

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

Suspicious use of SetWindowsHookEx

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

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

C:\Windows\SysWOW64\cmd.exe

C:\Windows\SysWOW64\explorer.exe

C:\Windows\SysWOW64\explorer.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 i.imgur.com udp
GB 151.101.60.193:443 i.imgur.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 193.60.101.151.in-addr.arpa udp
US 8.8.8.8:53 82.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 204.178.17.96.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 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 retghrtgwtrgtg.bounceme.net udp
RU 91.215.85.63:3839 retghrtgwtrgtg.bounceme.net tcp
US 8.8.8.8:53 63.85.215.91.in-addr.arpa udp
US 8.8.8.8:53 47.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 32.113.50.184.in-addr.arpa udp

Files

memory/3284-0-0x0000000000400000-0x0000000000488000-memory.dmp

memory/3284-1-0x00000000740D0000-0x000000007424B000-memory.dmp

memory/3284-2-0x00007FFFD5690000-0x00007FFFD5885000-memory.dmp

memory/3284-3-0x00000000740D0000-0x000000007424B000-memory.dmp

memory/3284-4-0x00000000740D0000-0x000000007424B000-memory.dmp

memory/4208-6-0x00000000740D0000-0x000000007424B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\9593495e

MD5 68b28f198fd237612c4bec43eb1cf994
SHA1 1d77229ec0651946d2937aa5b368877fca56575b
SHA256 636b6296acd0ca016c81a1e25e75244335fda2755a0b986bbdce918d69a6e3a9
SHA512 a45a73c44a62964128e25a4c91cd018baf61d65b192f868f4030782fe5de1549859fab1cb0a5371b41578c3788384430cee264c4fcefcb8b923d3eeccc9d0f5f

memory/4208-8-0x00007FFFD5690000-0x00007FFFD5885000-memory.dmp

memory/4208-10-0x00000000740D0000-0x000000007424B000-memory.dmp

memory/4208-11-0x00000000740D0000-0x000000007424B000-memory.dmp

memory/4208-13-0x00000000740D0000-0x000000007424B000-memory.dmp

memory/2452-14-0x00007FFFD5690000-0x00007FFFD5885000-memory.dmp

memory/2452-15-0x0000000000C00000-0x0000000000C84000-memory.dmp

memory/2452-18-0x00000000003E0000-0x0000000000813000-memory.dmp

memory/2452-19-0x0000000000C00000-0x0000000000C84000-memory.dmp

memory/2452-20-0x0000000000C00000-0x0000000000C84000-memory.dmp

memory/2452-21-0x0000000000C00000-0x0000000000C84000-memory.dmp

memory/2452-22-0x0000000000C00000-0x0000000000C84000-memory.dmp

memory/2452-23-0x0000000000C00000-0x0000000000C84000-memory.dmp

memory/2452-24-0x0000000000C00000-0x0000000000C84000-memory.dmp

memory/2452-25-0x0000000000C00000-0x0000000000C84000-memory.dmp

memory/2452-26-0x0000000000C00000-0x0000000000C84000-memory.dmp

memory/2452-27-0x0000000000C00000-0x0000000000C84000-memory.dmp

memory/2452-28-0x0000000000C00000-0x0000000000C84000-memory.dmp