Malware Analysis Report

2024-11-13 14:55

Sample ID 220725-elkbvadgg7
Target 998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b
SHA256 998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b
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

998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b

Threat Level: Known bad

The file 998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki

Kutaki family

Kutaki Executable

Executes dropped EXE

Drops startup file

Loads dropped DLL

Maps connected drives based on registry

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Modifies Internet Explorer settings

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-07-25 04:01

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-07-25 04:01

Reported

2022-07-26 05:30

Platform

win7-20220715-en

Max time kernel

150s

Max time network

49s

Command Line

"C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.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\jpomdvf.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.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\jpomdvf.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\jpomdvf.exe N/A

Enumerates physical storage devices

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Main C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 736 wrote to memory of 1128 N/A C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe C:\Windows\SysWOW64\cmd.exe
PID 736 wrote to memory of 1128 N/A C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe C:\Windows\SysWOW64\cmd.exe
PID 736 wrote to memory of 1128 N/A C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe C:\Windows\SysWOW64\cmd.exe
PID 736 wrote to memory of 1128 N/A C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe C:\Windows\SysWOW64\cmd.exe
PID 736 wrote to memory of 1244 N/A C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe
PID 736 wrote to memory of 1244 N/A C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe
PID 736 wrote to memory of 1244 N/A C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe
PID 736 wrote to memory of 1244 N/A C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe

Processes

C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe

"C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.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\jpomdvf.exe

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

Network

N/A

Files

memory/736-56-0x00000000762B1000-0x00000000762B3000-memory.dmp

memory/1128-57-0x0000000000000000-mapping.dmp

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

MD5 7d9d24216b329d14d4dd428a23070f29
SHA1 636d97af3f64ad9efe07c5b820e7afddbbf89f74
SHA256 998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b
SHA512 4af9920e7a8d73457702c6ab7b27eb20bd42d4ccc18d8e5c2014e319584894f263d613a72d3de3a44a811a60dfa1bbb10371bc3ffce28d2ac22978fc23f06e53

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

MD5 7d9d24216b329d14d4dd428a23070f29
SHA1 636d97af3f64ad9efe07c5b820e7afddbbf89f74
SHA256 998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b
SHA512 4af9920e7a8d73457702c6ab7b27eb20bd42d4ccc18d8e5c2014e319584894f263d613a72d3de3a44a811a60dfa1bbb10371bc3ffce28d2ac22978fc23f06e53

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

MD5 7d9d24216b329d14d4dd428a23070f29
SHA1 636d97af3f64ad9efe07c5b820e7afddbbf89f74
SHA256 998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b
SHA512 4af9920e7a8d73457702c6ab7b27eb20bd42d4ccc18d8e5c2014e319584894f263d613a72d3de3a44a811a60dfa1bbb10371bc3ffce28d2ac22978fc23f06e53

memory/1244-60-0x0000000000000000-mapping.dmp

memory/1244-65-0x0000000004201000-0x00000000050AD000-memory.dmp

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

MD5 7d9d24216b329d14d4dd428a23070f29
SHA1 636d97af3f64ad9efe07c5b820e7afddbbf89f74
SHA256 998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b
SHA512 4af9920e7a8d73457702c6ab7b27eb20bd42d4ccc18d8e5c2014e319584894f263d613a72d3de3a44a811a60dfa1bbb10371bc3ffce28d2ac22978fc23f06e53

Analysis: behavioral2

Detonation Overview

Submitted

2022-07-25 04:01

Reported

2022-07-26 05:30

Platform

win10v2004-20220721-en

Max time kernel

151s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.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\jpomdvf.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe N/A

Maps connected drives based on registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jpomdvf.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.exe

"C:\Users\Admin\AppData\Local\Temp\998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b.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\jpomdvf.exe

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

Network

Country Destination Domain Proto
US 93.184.221.240:80 tcp
NL 13.69.109.130:443 tcp
FR 2.18.109.224:443 tcp
US 93.184.221.240:80 tcp

Files

memory/1552-132-0x0000000000000000-mapping.dmp

memory/1828-133-0x0000000000000000-mapping.dmp

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

MD5 7d9d24216b329d14d4dd428a23070f29
SHA1 636d97af3f64ad9efe07c5b820e7afddbbf89f74
SHA256 998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b
SHA512 4af9920e7a8d73457702c6ab7b27eb20bd42d4ccc18d8e5c2014e319584894f263d613a72d3de3a44a811a60dfa1bbb10371bc3ffce28d2ac22978fc23f06e53

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

MD5 7d9d24216b329d14d4dd428a23070f29
SHA1 636d97af3f64ad9efe07c5b820e7afddbbf89f74
SHA256 998388008566177928bfbd0f18e36df434f262dc316726dff764e9b21045881b
SHA512 4af9920e7a8d73457702c6ab7b27eb20bd42d4ccc18d8e5c2014e319584894f263d613a72d3de3a44a811a60dfa1bbb10371bc3ffce28d2ac22978fc23f06e53