Malware Analysis Report

2024-11-13 14:55

Sample ID 220724-shpn2sgdej
Target f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc
SHA256 f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc
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

f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc

Threat Level: Known bad

The file f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc 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

Suspicious use of WriteProcessMemory

Modifies Internet Explorer settings

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-07-24 15:07

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-07-24 15:07

Reported

2022-07-24 15:10

Platform

win7-20220715-en

Max time kernel

150s

Max time network

48s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.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 created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.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\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.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-1-5-21-3440072777-2118400376-1759599358-1000\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 1972 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.exe C:\Windows\SysWOW64\cmd.exe
PID 1972 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.exe C:\Windows\SysWOW64\cmd.exe
PID 1972 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.exe C:\Windows\SysWOW64\cmd.exe
PID 1972 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.exe C:\Windows\SysWOW64\cmd.exe
PID 1972 wrote to memory of 1680 N/A C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe
PID 1972 wrote to memory of 1680 N/A C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe
PID 1972 wrote to memory of 1680 N/A C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe
PID 1972 wrote to memory of 1680 N/A C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe

Processes

C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.exe

"C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.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/1972-56-0x0000000074F71000-0x0000000074F73000-memory.dmp

memory/1708-57-0x0000000000000000-mapping.dmp

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

MD5 3d286767965d3960576a64e772175d6c
SHA1 b2fdeb9a1af6ea401c8388b1198a729caf01b4ce
SHA256 f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc
SHA512 217dd95656d7c0e76cda0e25f82857f16e2224b7d13e1fb050083a169450e403699ef65464b7de841820972b1c04a0055780c95e46932d9d24134e997b115ed8

memory/1680-60-0x0000000000000000-mapping.dmp

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

MD5 3d286767965d3960576a64e772175d6c
SHA1 b2fdeb9a1af6ea401c8388b1198a729caf01b4ce
SHA256 f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc
SHA512 217dd95656d7c0e76cda0e25f82857f16e2224b7d13e1fb050083a169450e403699ef65464b7de841820972b1c04a0055780c95e46932d9d24134e997b115ed8

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

MD5 3d286767965d3960576a64e772175d6c
SHA1 b2fdeb9a1af6ea401c8388b1198a729caf01b4ce
SHA256 f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc
SHA512 217dd95656d7c0e76cda0e25f82857f16e2224b7d13e1fb050083a169450e403699ef65464b7de841820972b1c04a0055780c95e46932d9d24134e997b115ed8

memory/1680-65-0x0000000003C51000-0x0000000004AFD000-memory.dmp

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

MD5 3d286767965d3960576a64e772175d6c
SHA1 b2fdeb9a1af6ea401c8388b1198a729caf01b4ce
SHA256 f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc
SHA512 217dd95656d7c0e76cda0e25f82857f16e2224b7d13e1fb050083a169450e403699ef65464b7de841820972b1c04a0055780c95e46932d9d24134e997b115ed8

Analysis: behavioral2

Detonation Overview

Submitted

2022-07-24 15:07

Reported

2022-07-24 15:10

Platform

win10v2004-20220721-en

Max time kernel

150s

Max time network

21s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.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\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.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\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.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\lunlerio.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum 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\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.exe

"C:\Users\Admin\AppData\Local\Temp\f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc.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/4400-132-0x0000000000000000-mapping.dmp

memory/548-133-0x0000000000000000-mapping.dmp

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

MD5 3d286767965d3960576a64e772175d6c
SHA1 b2fdeb9a1af6ea401c8388b1198a729caf01b4ce
SHA256 f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc
SHA512 217dd95656d7c0e76cda0e25f82857f16e2224b7d13e1fb050083a169450e403699ef65464b7de841820972b1c04a0055780c95e46932d9d24134e997b115ed8

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

MD5 3d286767965d3960576a64e772175d6c
SHA1 b2fdeb9a1af6ea401c8388b1198a729caf01b4ce
SHA256 f0719030fe6c57b80d5aa3716e8a878de08112f116e230afc10bfca73a29f2bc
SHA512 217dd95656d7c0e76cda0e25f82857f16e2224b7d13e1fb050083a169450e403699ef65464b7de841820972b1c04a0055780c95e46932d9d24134e997b115ed8