Malware Analysis Report

2024-11-15 07:18

Sample ID 220625-f48mtsfgek
Target 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA256 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
Tags
kutaki keylogger stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58

Threat Level: Known bad

The file 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58 was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki Executable

Kutaki family

Kutaki

Executes dropped EXE

Drops startup file

Loads dropped DLL

Maps connected drives based on registry

Enumerates physical storage devices

Modifies Internet Explorer settings

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-06-25 05:26

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-06-25 05:26

Reported

2022-06-25 06:26

Platform

win7-20220414-en

Max time kernel

188s

Max time network

45s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe"

Signatures

Kutaki

stealer keylogger kutaki

Kutaki Executable

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe N/A

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe N/A

Enumerates physical storage devices

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Main C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1764 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe C:\Windows\SysWOW64\cmd.exe
PID 1764 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe C:\Windows\SysWOW64\cmd.exe
PID 1764 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe C:\Windows\SysWOW64\cmd.exe
PID 1764 wrote to memory of 1380 N/A C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe C:\Windows\SysWOW64\cmd.exe
PID 1764 wrote to memory of 1736 N/A C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
PID 1764 wrote to memory of 1736 N/A C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
PID 1764 wrote to memory of 1736 N/A C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
PID 1764 wrote to memory of 1736 N/A C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

Processes

C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe

"C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /c C:\Users\Admin\AppData\Local\Temp\

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe"

Network

N/A

Files

memory/1764-56-0x0000000075BF1000-0x0000000075BF3000-memory.dmp

memory/1380-57-0x0000000000000000-mapping.dmp

\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

MD5 2600b7e78f3a1d996294bcc27b309594
SHA1 a90f63310dca46b419cfcbe95d90e1517932d6d3
SHA256 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA512 db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b

\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

MD5 2600b7e78f3a1d996294bcc27b309594
SHA1 a90f63310dca46b419cfcbe95d90e1517932d6d3
SHA256 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA512 db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b

memory/1736-60-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

MD5 2600b7e78f3a1d996294bcc27b309594
SHA1 a90f63310dca46b419cfcbe95d90e1517932d6d3
SHA256 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA512 db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

MD5 2600b7e78f3a1d996294bcc27b309594
SHA1 a90f63310dca46b419cfcbe95d90e1517932d6d3
SHA256 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA512 db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b

Analysis: behavioral2

Detonation Overview

Submitted

2022-06-25 05:26

Reported

2022-06-25 06:26

Platform

win10v2004-20220414-en

Max time kernel

158s

Max time network

182s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe"

Signatures

Kutaki

stealer keylogger kutaki

Kutaki Executable

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe N/A

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe

"C:\Users\Admin\AppData\Local\Temp\8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /c C:\Users\Admin\AppData\Local\Temp\

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe"

Network

Country Destination Domain Proto
NL 45.58.154.220:443 tcp
US 8.8.8.8:53 106.89.54.20.in-addr.arpa udp
DE 193.122.15.219:443 tcp

Files

memory/4060-132-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

MD5 2600b7e78f3a1d996294bcc27b309594
SHA1 a90f63310dca46b419cfcbe95d90e1517932d6d3
SHA256 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA512 db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b

memory/4068-133-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

MD5 2600b7e78f3a1d996294bcc27b309594
SHA1 a90f63310dca46b419cfcbe95d90e1517932d6d3
SHA256 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58
SHA512 db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b