Malware Analysis Report

2024-11-15 07:18

Sample ID 220625-1y1p9afhc5
Target 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA256 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
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

37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe

Threat Level: Known bad

The file 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki

Kutaki Executable

Kutaki family

Executes dropped EXE

Loads dropped DLL

Drops startup file

Maps connected drives based on registry

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

Modifies Internet Explorer settings

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-06-25 22:04

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 22:04

Reported

2022-06-25 23:36

Platform

win7-20220414-en

Max time kernel

157s

Max time network

47s

Command Line

"C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.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\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.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\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.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-1-5-21-1819626980-2277161760-1023733287-1000\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 1900 wrote to memory of 1336 N/A C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe C:\Windows\SysWOW64\cmd.exe
PID 1900 wrote to memory of 1336 N/A C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe C:\Windows\SysWOW64\cmd.exe
PID 1900 wrote to memory of 1336 N/A C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe C:\Windows\SysWOW64\cmd.exe
PID 1900 wrote to memory of 1336 N/A C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe C:\Windows\SysWOW64\cmd.exe
PID 1900 wrote to memory of 1448 N/A C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
PID 1900 wrote to memory of 1448 N/A C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
PID 1900 wrote to memory of 1448 N/A C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
PID 1900 wrote to memory of 1448 N/A C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

Processes

C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe

"C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.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/1900-56-0x0000000076011000-0x0000000076013000-memory.dmp

memory/1336-57-0x0000000000000000-mapping.dmp

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

MD5 eb31bd6d5ff7c28b47395961db00d4bd
SHA1 2a41952d03da49c16095cc5aca603cd3bb8a2972
SHA256 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512 c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137

memory/1448-60-0x0000000000000000-mapping.dmp

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

MD5 eb31bd6d5ff7c28b47395961db00d4bd
SHA1 2a41952d03da49c16095cc5aca603cd3bb8a2972
SHA256 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512 c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137

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

MD5 eb31bd6d5ff7c28b47395961db00d4bd
SHA1 2a41952d03da49c16095cc5aca603cd3bb8a2972
SHA256 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512 c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137

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

MD5 eb31bd6d5ff7c28b47395961db00d4bd
SHA1 2a41952d03da49c16095cc5aca603cd3bb8a2972
SHA256 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512 c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137

Analysis: behavioral2

Detonation Overview

Submitted

2022-06-25 22:04

Reported

2022-06-25 23:37

Platform

win10v2004-20220414-en

Max time kernel

154s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.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\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.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\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.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\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe

"C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.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
US 52.168.117.169:443 tcp
US 8.8.8.8:53 15.89.54.20.in-addr.arpa udp
NL 104.110.191.140:80 tcp
US 204.79.197.203:80 tcp
NL 88.221.144.179:80 tcp
US 8.8.8.8:53 106.89.54.20.in-addr.arpa udp
US 8.8.8.8:53 9.9.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.0.2.0.0.0.0.2.0.1.3.0.6.2.ip6.arpa udp

Files

memory/940-132-0x0000000000000000-mapping.dmp

memory/5104-133-0x0000000000000000-mapping.dmp

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

MD5 eb31bd6d5ff7c28b47395961db00d4bd
SHA1 2a41952d03da49c16095cc5aca603cd3bb8a2972
SHA256 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512 c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137

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

MD5 eb31bd6d5ff7c28b47395961db00d4bd
SHA1 2a41952d03da49c16095cc5aca603cd3bb8a2972
SHA256 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512 c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137