Malware Analysis Report

2024-11-15 07:18

Sample ID 220701-gbmekaecbp
Target 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
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

689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f

Threat Level: Known bad

The file 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki Executable

Kutaki

Kutaki family

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

2022-07-01 05:37

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 05:37

Reported

2022-07-01 06:42

Platform

win7-20220414-en

Max time kernel

150s

Max time network

43s

Command Line

"C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.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 opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.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-1-5-21-790309383-526510583-3802439154-1000\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 1552 wrote to memory of 1456 N/A C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe C:\Windows\SysWOW64\cmd.exe
PID 1552 wrote to memory of 1456 N/A C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe C:\Windows\SysWOW64\cmd.exe
PID 1552 wrote to memory of 1456 N/A C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe C:\Windows\SysWOW64\cmd.exe
PID 1552 wrote to memory of 1456 N/A C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe C:\Windows\SysWOW64\cmd.exe
PID 1552 wrote to memory of 996 N/A C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
PID 1552 wrote to memory of 996 N/A C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
PID 1552 wrote to memory of 996 N/A C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
PID 1552 wrote to memory of 996 N/A C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

Processes

C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe

"C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.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/1552-56-0x00000000759E1000-0x00000000759E3000-memory.dmp

memory/1456-57-0x0000000000000000-mapping.dmp

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

MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2

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

MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2

memory/996-60-0x0000000000000000-mapping.dmp

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

MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2

memory/996-65-0x0000000003911000-0x00000000047BD000-memory.dmp

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

MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2

Analysis: behavioral2

Detonation Overview

Submitted

2022-07-01 05:37

Reported

2022-07-01 06:44

Platform

win10v2004-20220414-en

Max time kernel

153s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.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\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.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\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.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\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe

"C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.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 52.242.101.226:443 tcp
NL 104.110.191.140:80 tcp
NL 104.110.191.140:80 tcp
US 13.89.178.26:443 tcp
NL 104.110.191.140:80 tcp
NL 104.110.191.140:80 tcp
GB 92.123.140.25:80 tcp
US 52.242.101.226:443 tcp
US 8.8.8.8:53 226.101.242.52.in-addr.arpa udp

Files

memory/4004-132-0x0000000000000000-mapping.dmp

memory/2188-133-0x0000000000000000-mapping.dmp

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

MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2

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

MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2