Malware Analysis Report

2024-11-30 11:25

Sample ID 220529-z7lr1sedej
Target 0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76
SHA256 0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76
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

0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76

Threat Level: Known bad

The file 0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76 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

Modifies Internet Explorer settings

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-05-29 21:21

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-05-29 21:21

Reported

2022-05-29 21:39

Platform

win7-20220414-en

Max time kernel

187s

Max time network

46s

Command Line

"C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.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\lunlerio.exe N/A

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.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\lunlerio.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\lunlerio.exe N/A

Enumerates physical storage devices

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1792 wrote to memory of 1408 N/A C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe C:\Windows\SysWOW64\cmd.exe
PID 1792 wrote to memory of 1408 N/A C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe C:\Windows\SysWOW64\cmd.exe
PID 1792 wrote to memory of 1408 N/A C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe C:\Windows\SysWOW64\cmd.exe
PID 1792 wrote to memory of 1408 N/A C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe C:\Windows\SysWOW64\cmd.exe
PID 1792 wrote to memory of 1564 N/A C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe
PID 1792 wrote to memory of 1564 N/A C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe
PID 1792 wrote to memory of 1564 N/A C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe
PID 1792 wrote to memory of 1564 N/A C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe

Processes

C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe

"C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.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\lunlerio.exe

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

Network

N/A

Files

memory/1792-56-0x0000000075AE1000-0x0000000075AE3000-memory.dmp

memory/1408-57-0x0000000000000000-mapping.dmp

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

MD5 ee9d608c58f615144948a76f0c271dda
SHA1 f95fcd18d45361e61b6947c4002e10b714b12127
SHA256 0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76
SHA512 32c45c057f1cdbf85085fb07cd490489acbf44d17dd6985141145807e441d8837c0be2650c664e1aaef39da968131435ebdf01446f064167ad42929f2d8dc503

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

MD5 ee9d608c58f615144948a76f0c271dda
SHA1 f95fcd18d45361e61b6947c4002e10b714b12127
SHA256 0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76
SHA512 32c45c057f1cdbf85085fb07cd490489acbf44d17dd6985141145807e441d8837c0be2650c664e1aaef39da968131435ebdf01446f064167ad42929f2d8dc503

memory/1564-60-0x0000000000000000-mapping.dmp

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

MD5 ee9d608c58f615144948a76f0c271dda
SHA1 f95fcd18d45361e61b6947c4002e10b714b12127
SHA256 0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76
SHA512 32c45c057f1cdbf85085fb07cd490489acbf44d17dd6985141145807e441d8837c0be2650c664e1aaef39da968131435ebdf01446f064167ad42929f2d8dc503

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

MD5 ee9d608c58f615144948a76f0c271dda
SHA1 f95fcd18d45361e61b6947c4002e10b714b12127
SHA256 0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76
SHA512 32c45c057f1cdbf85085fb07cd490489acbf44d17dd6985141145807e441d8837c0be2650c664e1aaef39da968131435ebdf01446f064167ad42929f2d8dc503

Analysis: behavioral2

Detonation Overview

Submitted

2022-05-29 21:21

Reported

2022-05-29 21:39

Platform

win10v2004-20220414-en

Max time kernel

186s

Max time network

176s

Command Line

"C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.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\lunlerio.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.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\lunlerio.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\lunlerio.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.exe

"C:\Users\Admin\AppData\Local\Temp\0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76.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\lunlerio.exe

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

Network

Country Destination Domain Proto
US 67.26.205.254:80 tcp
US 67.26.205.254:80 tcp
US 20.42.65.88:443 tcp
US 67.26.205.254:80 tcp
US 67.26.205.254:80 tcp
US 67.26.205.254:80 tcp
US 8.8.8.8:53 97.97.242.52.in-addr.arpa udp
US 8.8.8.8:53 226.101.242.52.in-addr.arpa udp

Files

memory/3016-132-0x0000000000000000-mapping.dmp

memory/4252-133-0x0000000000000000-mapping.dmp

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

MD5 ee9d608c58f615144948a76f0c271dda
SHA1 f95fcd18d45361e61b6947c4002e10b714b12127
SHA256 0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76
SHA512 32c45c057f1cdbf85085fb07cd490489acbf44d17dd6985141145807e441d8837c0be2650c664e1aaef39da968131435ebdf01446f064167ad42929f2d8dc503

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

MD5 ee9d608c58f615144948a76f0c271dda
SHA1 f95fcd18d45361e61b6947c4002e10b714b12127
SHA256 0d3cf290f14c09e02aa3cea0c711e01955131d829cf7369b1f2dba351ba49d76
SHA512 32c45c057f1cdbf85085fb07cd490489acbf44d17dd6985141145807e441d8837c0be2650c664e1aaef39da968131435ebdf01446f064167ad42929f2d8dc503