Malware Analysis Report

2024-11-15 07:18

Sample ID 220708-y7es2affal
Target 40418497967b8c7c4d92587f9f34854f1eef670cb95a0908f066d81a7bcc3d96
SHA256 40418497967b8c7c4d92587f9f34854f1eef670cb95a0908f066d81a7bcc3d96
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

40418497967b8c7c4d92587f9f34854f1eef670cb95a0908f066d81a7bcc3d96

Threat Level: Known bad

The file 40418497967b8c7c4d92587f9f34854f1eef670cb95a0908f066d81a7bcc3d96 was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki family

Kutaki

Kutaki Executable

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

2022-07-08 20:25

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-07-08 20:25

Reported

2022-07-08 23:20

Platform

win7-20220414-en

Max time kernel

150s

Max time network

49s

Command Line

"C:\Users\Admin\AppData\Local\Temp\TDS Challan.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 created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe C:\Users\Admin\AppData\Local\Temp\TDS Challan.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\TDS Challan.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\TDS Challan.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-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe

"C:\Users\Admin\AppData\Local\Temp\TDS Challan.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/2044-56-0x0000000075441000-0x0000000075443000-memory.dmp

memory/1904-57-0x0000000000000000-mapping.dmp

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

MD5 645be265d5378cdfdda8a059a228b9a2
SHA1 2d7816de252f0881583fce21ccd4ef2e9bfe1dff
SHA256 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
SHA512 55ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a

memory/1644-60-0x0000000000000000-mapping.dmp

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

MD5 645be265d5378cdfdda8a059a228b9a2
SHA1 2d7816de252f0881583fce21ccd4ef2e9bfe1dff
SHA256 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
SHA512 55ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a

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

MD5 645be265d5378cdfdda8a059a228b9a2
SHA1 2d7816de252f0881583fce21ccd4ef2e9bfe1dff
SHA256 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
SHA512 55ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a

memory/1644-65-0x0000000003851000-0x00000000046FD000-memory.dmp

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

MD5 645be265d5378cdfdda8a059a228b9a2
SHA1 2d7816de252f0881583fce21ccd4ef2e9bfe1dff
SHA256 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
SHA512 55ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a

Analysis: behavioral2

Detonation Overview

Submitted

2022-07-08 20:25

Reported

2022-07-08 23:20

Platform

win10v2004-20220414-en

Max time kernel

150s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\TDS Challan.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\TDS Challan.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\TDS Challan.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\TDS Challan.exe

"C:\Users\Admin\AppData\Local\Temp\TDS Challan.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
NL 104.97.14.81:80 tcp
NL 52.178.17.2:443 tcp
NL 104.110.191.133:80 tcp
NL 104.110.191.133:80 tcp
FR 2.18.109.224:443 tcp
US 104.18.24.243:80 tcp
NL 104.123.41.162:80 tcp

Files

memory/5108-132-0x0000000000000000-mapping.dmp

memory/2764-133-0x0000000000000000-mapping.dmp

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

MD5 645be265d5378cdfdda8a059a228b9a2
SHA1 2d7816de252f0881583fce21ccd4ef2e9bfe1dff
SHA256 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
SHA512 55ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a

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

MD5 645be265d5378cdfdda8a059a228b9a2
SHA1 2d7816de252f0881583fce21ccd4ef2e9bfe1dff
SHA256 a09fd5ecf91fcdc892b38fb7fb356a972134863f8b639f307d01d688d2e3c050
SHA512 55ccb2dfdf6776550bda7b476bdaac6ba6dac2d97f215d57b0e164544befbabb8732006cc1d8920452553f38dc453f497266d12d184bee79bb2ce3f5c7702f7a