Malware Analysis Report

2024-11-30 11:24

Sample ID 220524-3dfwfsfchj
Target 7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969
SHA256 7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969
Tags
kutaki keylogger stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969

Threat Level: Known bad

The file 7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969 was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki

Kutaki Executable

Kutaki family

Executes dropped EXE

Loads dropped DLL

Drops startup file

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

Modifies Internet Explorer settings

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-05-24 23:23

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral2

Detonation Overview

Submitted

2022-05-24 23:23

Reported

2022-05-24 23:28

Platform

win10v2004-20220414-en

Max time kernel

125s

Max time network

140s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.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\adnvdjch.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\adnvdjch.exe C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\adnvdjch.exe C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe

"C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.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\adnvdjch.exe

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

Network

Country Destination Domain Proto
US 93.184.221.240:80 tcp
US 8.253.135.241:80 tcp
US 20.189.173.12:443 tcp
NL 104.110.191.140:80 tcp
NL 104.110.191.140:80 tcp
NL 178.79.208.1:80 tcp
NL 104.110.191.140:80 tcp

Files

memory/312-132-0x0000000000000000-mapping.dmp

memory/4708-133-0x0000000000000000-mapping.dmp

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

MD5 02fb4ae633b32d995eb743f05c809a11
SHA1 2a0b7f69b70951de4070efaaa372eba24ba039ef
SHA256 7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969
SHA512 80221e606fc3d0c5b1c508e7d67b8eb999051d554ae60170cdcd8c5d8d912d35e1862c4035896c32eaddd835bb8adb63853bcf1f47731caebf146c7a3b194922

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

MD5 02fb4ae633b32d995eb743f05c809a11
SHA1 2a0b7f69b70951de4070efaaa372eba24ba039ef
SHA256 7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969
SHA512 80221e606fc3d0c5b1c508e7d67b8eb999051d554ae60170cdcd8c5d8d912d35e1862c4035896c32eaddd835bb8adb63853bcf1f47731caebf146c7a3b194922

Analysis: behavioral1

Detonation Overview

Submitted

2022-05-24 23:23

Reported

2022-05-24 23:29

Platform

win7-20220414-en

Max time kernel

149s

Max time network

42s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.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\pnejwech.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.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\pnejwech.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1768 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe C:\Windows\SysWOW64\cmd.exe
PID 1768 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe C:\Windows\SysWOW64\cmd.exe
PID 1768 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe C:\Windows\SysWOW64\cmd.exe
PID 1768 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe C:\Windows\SysWOW64\cmd.exe
PID 1768 wrote to memory of 1596 N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe
PID 1768 wrote to memory of 1596 N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe
PID 1768 wrote to memory of 1596 N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe
PID 1768 wrote to memory of 1596 N/A C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pnejwech.exe

Processes

C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.exe

"C:\Users\Admin\AppData\Local\Temp\7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969.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\pnejwech.exe

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

Network

N/A

Files

memory/1768-56-0x0000000075C01000-0x0000000075C03000-memory.dmp

memory/1660-57-0x0000000000000000-mapping.dmp

memory/1596-60-0x0000000000000000-mapping.dmp

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

MD5 02fb4ae633b32d995eb743f05c809a11
SHA1 2a0b7f69b70951de4070efaaa372eba24ba039ef
SHA256 7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969
SHA512 80221e606fc3d0c5b1c508e7d67b8eb999051d554ae60170cdcd8c5d8d912d35e1862c4035896c32eaddd835bb8adb63853bcf1f47731caebf146c7a3b194922

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

MD5 02fb4ae633b32d995eb743f05c809a11
SHA1 2a0b7f69b70951de4070efaaa372eba24ba039ef
SHA256 7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969
SHA512 80221e606fc3d0c5b1c508e7d67b8eb999051d554ae60170cdcd8c5d8d912d35e1862c4035896c32eaddd835bb8adb63853bcf1f47731caebf146c7a3b194922

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

MD5 02fb4ae633b32d995eb743f05c809a11
SHA1 2a0b7f69b70951de4070efaaa372eba24ba039ef
SHA256 7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969
SHA512 80221e606fc3d0c5b1c508e7d67b8eb999051d554ae60170cdcd8c5d8d912d35e1862c4035896c32eaddd835bb8adb63853bcf1f47731caebf146c7a3b194922

memory/1596-65-0x0000000003F31000-0x0000000004DDD000-memory.dmp

memory/1596-66-0x0000000003EE0000-0x0000000003EEB000-memory.dmp

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

MD5 02fb4ae633b32d995eb743f05c809a11
SHA1 2a0b7f69b70951de4070efaaa372eba24ba039ef
SHA256 7e4a52fd3f3714a68347a797a900fe73c4b53ac61d2c685ac180cf8664006969
SHA512 80221e606fc3d0c5b1c508e7d67b8eb999051d554ae60170cdcd8c5d8d912d35e1862c4035896c32eaddd835bb8adb63853bcf1f47731caebf146c7a3b194922