Malware Analysis Report

2024-11-30 11:25

Sample ID 211229-kvhr9sdccm
Target 30ae864bbb52f134f172124ee1e229bb
SHA256 1810e76a7f52cbb783412b2aeb93298fd31e3fd59e66cca317e16bd1079e9c71
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

1810e76a7f52cbb783412b2aeb93298fd31e3fd59e66cca317e16bd1079e9c71

Threat Level: Known bad

The file 30ae864bbb52f134f172124ee1e229bb was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki family

Kutaki

Kutaki Executable

Executes dropped EXE

Loads dropped DLL

Drops startup file

Drops file in Windows directory

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Modifies Internet Explorer settings

Modifies registry class

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-12-29 08:55

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2021-12-29 08:55

Reported

2021-12-29 08:57

Platform

win7-en-20211208

Max time kernel

122s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\image.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\gtvluech.exe N/A

Drops startup file

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\image.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\image.exe N/A

Enumerates physical storage devices

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Internet Explorer\Main C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gtvluech.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\DllHost.exe N/A

Suspicious use of SetWindowsHookEx

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

Processes

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

"C:\Users\Admin\AppData\Local\Temp\image.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp

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

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

C:\Windows\SysWOW64\DllHost.exe

C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}

Network

N/A

Files

memory/1448-55-0x0000000000220000-0x0000000000226000-memory.dmp

memory/1448-56-0x0000000000220000-0x000000000022A000-memory.dmp

memory/1448-57-0x00000000763B1000-0x00000000763B3000-memory.dmp

memory/360-58-0x0000000000000000-mapping.dmp

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

MD5 c43b7d74eef3fa1c025f08939e9d4be2
SHA1 0b41411bd1f52c115d77fc44815beed1b3cb749c
SHA256 d0fd86e3254a14f3b99d141b8512eae447cd716436ba8a192422596a2b0bb625
SHA512 9104a982f97370c03a95955b86bd9c37681d2c5aed2ba46ed0f113d915dbd83b1d237c6c5b128e24c7a3a3dc01c11fded5ef9eecf217255da98dd0eea5ee4d3d

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

MD5 c43b7d74eef3fa1c025f08939e9d4be2
SHA1 0b41411bd1f52c115d77fc44815beed1b3cb749c
SHA256 d0fd86e3254a14f3b99d141b8512eae447cd716436ba8a192422596a2b0bb625
SHA512 9104a982f97370c03a95955b86bd9c37681d2c5aed2ba46ed0f113d915dbd83b1d237c6c5b128e24c7a3a3dc01c11fded5ef9eecf217255da98dd0eea5ee4d3d

memory/568-61-0x0000000000000000-mapping.dmp

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

MD5 c43b7d74eef3fa1c025f08939e9d4be2
SHA1 0b41411bd1f52c115d77fc44815beed1b3cb749c
SHA256 d0fd86e3254a14f3b99d141b8512eae447cd716436ba8a192422596a2b0bb625
SHA512 9104a982f97370c03a95955b86bd9c37681d2c5aed2ba46ed0f113d915dbd83b1d237c6c5b128e24c7a3a3dc01c11fded5ef9eecf217255da98dd0eea5ee4d3d

memory/360-68-0x00000000004F0000-0x00000000004F2000-memory.dmp

memory/1632-69-0x0000000000160000-0x0000000000162000-memory.dmp

memory/1632-70-0x0000000000240000-0x0000000000241000-memory.dmp

memory/568-71-0x0000000003E71000-0x0000000004D1D000-memory.dmp

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

MD5 c43b7d74eef3fa1c025f08939e9d4be2
SHA1 0b41411bd1f52c115d77fc44815beed1b3cb749c
SHA256 d0fd86e3254a14f3b99d141b8512eae447cd716436ba8a192422596a2b0bb625
SHA512 9104a982f97370c03a95955b86bd9c37681d2c5aed2ba46ed0f113d915dbd83b1d237c6c5b128e24c7a3a3dc01c11fded5ef9eecf217255da98dd0eea5ee4d3d

Analysis: behavioral2

Detonation Overview

Submitted

2021-12-29 08:55

Reported

2021-12-29 08:57

Platform

win10-en-20211208

Max time kernel

132s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\image.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\zbzljvch.exe N/A

Drops startup file

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

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Debug\WIA\wiatrace.log C:\Windows\SysWOW64\mspaint.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000_Classes\Local Settings C:\Windows\SysWOW64\cmd.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\mspaint.exe N/A
N/A N/A C:\Windows\SysWOW64\mspaint.exe N/A

Processes

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

"C:\Users\Admin\AppData\Local\Temp\image.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp

C:\Windows\SysWOW64\mspaint.exe

"C:\Windows\system32\mspaint.exe" "C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp"

\??\c:\windows\system32\svchost.exe

c:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s DeviceAssociationService

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

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

Network

Country Destination Domain Proto
US 52.109.8.21:443 tcp
US 8.8.8.8:53 time.windows.com udp
NL 20.101.57.9:123 time.windows.com udp

Files

memory/1444-117-0x0000000000000000-mapping.dmp

memory/3676-118-0x0000000000000000-mapping.dmp

memory/704-119-0x0000000000000000-mapping.dmp

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

MD5 c43b7d74eef3fa1c025f08939e9d4be2
SHA1 0b41411bd1f52c115d77fc44815beed1b3cb749c
SHA256 d0fd86e3254a14f3b99d141b8512eae447cd716436ba8a192422596a2b0bb625
SHA512 9104a982f97370c03a95955b86bd9c37681d2c5aed2ba46ed0f113d915dbd83b1d237c6c5b128e24c7a3a3dc01c11fded5ef9eecf217255da98dd0eea5ee4d3d

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

MD5 c43b7d74eef3fa1c025f08939e9d4be2
SHA1 0b41411bd1f52c115d77fc44815beed1b3cb749c
SHA256 d0fd86e3254a14f3b99d141b8512eae447cd716436ba8a192422596a2b0bb625
SHA512 9104a982f97370c03a95955b86bd9c37681d2c5aed2ba46ed0f113d915dbd83b1d237c6c5b128e24c7a3a3dc01c11fded5ef9eecf217255da98dd0eea5ee4d3d