Malware Analysis Report

2024-11-15 07:18

Sample ID 220701-eddjbsaggk
Target db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
SHA256 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
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

db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841

Threat Level: Known bad

The file db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841 was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki

Kutaki family

Kutaki Executable

Executes dropped EXE

Loads dropped DLL

Drops startup file

Maps connected drives based on registry

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-07-01 03:49

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-07-01 03:49

Reported

2022-07-01 04:30

Platform

win7-20220414-en

Max time kernel

142s

Max time network

44s

Command Line

"C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.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\zeqtnwch.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zeqtnwch.exe C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zeqtnwch.exe C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe N/A

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 948 wrote to memory of 1028 N/A C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe C:\Windows\SysWOW64\cmd.exe
PID 948 wrote to memory of 1028 N/A C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe C:\Windows\SysWOW64\cmd.exe
PID 948 wrote to memory of 1028 N/A C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe C:\Windows\SysWOW64\cmd.exe
PID 948 wrote to memory of 1028 N/A C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe C:\Windows\SysWOW64\cmd.exe
PID 948 wrote to memory of 980 N/A C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zeqtnwch.exe
PID 948 wrote to memory of 980 N/A C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zeqtnwch.exe
PID 948 wrote to memory of 980 N/A C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zeqtnwch.exe
PID 948 wrote to memory of 980 N/A C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zeqtnwch.exe

Processes

C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe

"C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.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\zeqtnwch.exe

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

Network

N/A

Files

memory/948-56-0x0000000074F21000-0x0000000074F23000-memory.dmp

memory/1028-57-0x0000000000000000-mapping.dmp

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

MD5 a20059fdc62668a1bc68d5f1691b33de
SHA1 6f86fab1c3f5897c46e7a8a9386214c1dd3be4da
SHA256 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
SHA512 5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb

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

MD5 a20059fdc62668a1bc68d5f1691b33de
SHA1 6f86fab1c3f5897c46e7a8a9386214c1dd3be4da
SHA256 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
SHA512 5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb

memory/980-60-0x0000000000000000-mapping.dmp

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

MD5 a20059fdc62668a1bc68d5f1691b33de
SHA1 6f86fab1c3f5897c46e7a8a9386214c1dd3be4da
SHA256 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
SHA512 5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb

Analysis: behavioral2

Detonation Overview

Submitted

2022-07-01 03:49

Reported

2022-07-01 04:30

Platform

win10v2004-20220414-en

Max time kernel

153s

Max time network

161s

Command Line

"C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.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\femsfach.exe N/A

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.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\femsfach.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\femsfach.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe

"C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.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\femsfach.exe

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

Network

Country Destination Domain Proto
NL 104.110.191.140:80 tcp
NL 104.110.191.133:80 tcp
US 20.42.72.131:443 tcp
US 40.125.122.151:443 tcp
US 204.79.197.203:80 tcp
US 8.8.8.8:53 164.2.77.40.in-addr.arpa udp
NL 104.110.191.140:80 tcp
US 8.8.8.8:53 f.7.6.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.7.0.0.0.0.3.0.1.3.0.6.2.ip6.arpa udp

Files

memory/5052-132-0x0000000000000000-mapping.dmp

memory/1600-133-0x0000000000000000-mapping.dmp

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

MD5 a20059fdc62668a1bc68d5f1691b33de
SHA1 6f86fab1c3f5897c46e7a8a9386214c1dd3be4da
SHA256 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
SHA512 5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb

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

MD5 a20059fdc62668a1bc68d5f1691b33de
SHA1 6f86fab1c3f5897c46e7a8a9386214c1dd3be4da
SHA256 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
SHA512 5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb