Malware Analysis Report

2024-11-30 11:27

Sample ID 220329-yrdwssegaj
Target a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659
SHA256 a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659
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

a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659

Threat Level: Known bad

The file a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659 was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki

Kutaki Executable

Kutaki family

Executes dropped EXE

Drops startup file

Loads dropped DLL

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-03-29 20:00

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-03-29 20:00

Reported

2022-03-30 23:38

Platform

win7-20220311-en

Max time kernel

4294183s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.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

Executes dropped EXE

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

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1968 wrote to memory of 300 N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe C:\Windows\SysWOW64\cmd.exe
PID 1968 wrote to memory of 300 N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe C:\Windows\SysWOW64\cmd.exe
PID 1968 wrote to memory of 300 N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe C:\Windows\SysWOW64\cmd.exe
PID 1968 wrote to memory of 300 N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe C:\Windows\SysWOW64\cmd.exe
PID 1968 wrote to memory of 1732 N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe
PID 1968 wrote to memory of 1732 N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe
PID 1968 wrote to memory of 1732 N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe
PID 1968 wrote to memory of 1732 N/A C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe

"C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.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\fbzxyrch.exe

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

Network

N/A

Files

memory/1968-56-0x00000000767A1000-0x00000000767A3000-memory.dmp

memory/300-57-0x0000000000000000-mapping.dmp

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

MD5 5d481b1a50c3d6477180f413f1b5597c
SHA1 3cb1c4f6622fbd6b591fd3f50fa18664c6d9d0ca
SHA256 a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659
SHA512 d0ec083a97be0ce6fa33cf6dd3e424e1f939fded0dbaebed0f66c7871071cfc355c8da117726fd9328537595b6ca641f4dc7419baf7f105cf018a3deed5f1f0c

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

MD5 5d481b1a50c3d6477180f413f1b5597c
SHA1 3cb1c4f6622fbd6b591fd3f50fa18664c6d9d0ca
SHA256 a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659
SHA512 d0ec083a97be0ce6fa33cf6dd3e424e1f939fded0dbaebed0f66c7871071cfc355c8da117726fd9328537595b6ca641f4dc7419baf7f105cf018a3deed5f1f0c

memory/1732-60-0x0000000000000000-mapping.dmp

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

MD5 5d481b1a50c3d6477180f413f1b5597c
SHA1 3cb1c4f6622fbd6b591fd3f50fa18664c6d9d0ca
SHA256 a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659
SHA512 d0ec083a97be0ce6fa33cf6dd3e424e1f939fded0dbaebed0f66c7871071cfc355c8da117726fd9328537595b6ca641f4dc7419baf7f105cf018a3deed5f1f0c

Analysis: behavioral2

Detonation Overview

Submitted

2022-03-29 20:00

Reported

2022-03-30 23:39

Platform

win10v2004-en-20220113

Max time kernel

129s

Max time network

133s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.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\efpmmpch.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\efpmmpch.exe C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\efpmmpch.exe C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe

"C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.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\efpmmpch.exe

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

Network

Files

memory/4112-132-0x0000000000000000-mapping.dmp

memory/4972-133-0x0000000000000000-mapping.dmp

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

MD5 5d481b1a50c3d6477180f413f1b5597c
SHA1 3cb1c4f6622fbd6b591fd3f50fa18664c6d9d0ca
SHA256 a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659
SHA512 d0ec083a97be0ce6fa33cf6dd3e424e1f939fded0dbaebed0f66c7871071cfc355c8da117726fd9328537595b6ca641f4dc7419baf7f105cf018a3deed5f1f0c

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

MD5 5d481b1a50c3d6477180f413f1b5597c
SHA1 3cb1c4f6622fbd6b591fd3f50fa18664c6d9d0ca
SHA256 a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659
SHA512 d0ec083a97be0ce6fa33cf6dd3e424e1f939fded0dbaebed0f66c7871071cfc355c8da117726fd9328537595b6ca641f4dc7419baf7f105cf018a3deed5f1f0c