Malware Analysis Report

2024-11-15 07:18

Sample ID 220703-kyb4wsfag7
Target IncomeTax_Payment_Receipt.exe
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
Tags
kutaki keylogger stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307

Threat Level: Known bad

The file IncomeTax_Payment_Receipt.exe 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

Program crash

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2022-07-03 09:00

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-07-03 09:00

Reported

2022-07-03 09:03

Platform

win7-20220414-en

Max time kernel

97s

Max time network

42s

Command Line

"C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.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
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N/A N/A N/A N/A
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Executes dropped EXE

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

Drops startup file

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

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 872 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe C:\Windows\SysWOW64\cmd.exe
PID 872 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe C:\Windows\SysWOW64\cmd.exe
PID 872 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe C:\Windows\SysWOW64\cmd.exe
PID 872 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe C:\Windows\SysWOW64\cmd.exe
PID 872 wrote to memory of 2040 N/A C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xlxtvpch.exe
PID 872 wrote to memory of 2040 N/A C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xlxtvpch.exe
PID 872 wrote to memory of 2040 N/A C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xlxtvpch.exe
PID 872 wrote to memory of 2040 N/A C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xlxtvpch.exe
PID 2040 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xlxtvpch.exe C:\Windows\SysWOW64\WerFault.exe
PID 2040 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xlxtvpch.exe C:\Windows\SysWOW64\WerFault.exe
PID 2040 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xlxtvpch.exe C:\Windows\SysWOW64\WerFault.exe
PID 2040 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xlxtvpch.exe C:\Windows\SysWOW64\WerFault.exe

Processes

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

"C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.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\xlxtvpch.exe

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2040 -s 304

Network

N/A

Files

memory/872-56-0x00000000764C1000-0x00000000764C3000-memory.dmp

memory/1352-57-0x0000000000000000-mapping.dmp

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

MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f

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

MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f

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

MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f

memory/2040-60-0x0000000000000000-mapping.dmp

memory/2040-65-0x0000000004021000-0x0000000004ECD000-memory.dmp

memory/1532-66-0x0000000000000000-mapping.dmp

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

MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f

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

MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f

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

MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f

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

MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f

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

MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f

Analysis: behavioral2

Detonation Overview

Submitted

2022-07-03 09:00

Reported

2022-07-03 09:04

Platform

win10v2004-20220414-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.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\sgrodtch.exe N/A

Drops startup file

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

Processes

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

"C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.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\sgrodtch.exe

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

Network

Country Destination Domain Proto
NL 8.238.21.254:80 tcp
NL 8.238.24.126:80 tcp
NL 8.238.24.126:80 tcp
IE 52.109.76.31:443 tcp

Files

memory/2324-132-0x0000000000000000-mapping.dmp

memory/792-133-0x0000000000000000-mapping.dmp

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

MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f

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

MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f