Malware Analysis Report

2024-11-30 11:27

Sample ID 220326-tpsvqaega7
Target b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa
SHA256 b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa
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

b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa

Threat Level: Known bad

The file b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki family

Kutaki Executable

Kutaki

Executes dropped EXE

Loads dropped DLL

Drops startup file

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-03-26 16:14

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-03-26 16:14

Reported

2022-03-26 16:19

Platform

win7-20220311-en

Max time kernel

4294182s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.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

Executes dropped EXE

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

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1336 wrote to memory of 1572 N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe C:\Windows\SysWOW64\cmd.exe
PID 1336 wrote to memory of 1572 N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe C:\Windows\SysWOW64\cmd.exe
PID 1336 wrote to memory of 1572 N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe C:\Windows\SysWOW64\cmd.exe
PID 1336 wrote to memory of 1572 N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe C:\Windows\SysWOW64\cmd.exe
PID 1336 wrote to memory of 1080 N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe
PID 1336 wrote to memory of 1080 N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe
PID 1336 wrote to memory of 1080 N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe
PID 1336 wrote to memory of 1080 N/A C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\areunnch.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe

"C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.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\areunnch.exe

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

Network

N/A

Files

memory/1336-56-0x0000000075561000-0x0000000075563000-memory.dmp

memory/1572-57-0x0000000000000000-mapping.dmp

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

MD5 195938a648efcaf6fcf0a1a3ccde0b7d
SHA1 475af17dfa9fb2dc370554710fc2b7a4f6bdd2e9
SHA256 b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa
SHA512 5f2415687dd44e8e9e2bcc89c1ddc077fad1d789c64f249306e0b10578029b7821588cb3df80dfa545732583eccea091a0f49fdff85d4455546b2691b440acac

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

MD5 195938a648efcaf6fcf0a1a3ccde0b7d
SHA1 475af17dfa9fb2dc370554710fc2b7a4f6bdd2e9
SHA256 b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa
SHA512 5f2415687dd44e8e9e2bcc89c1ddc077fad1d789c64f249306e0b10578029b7821588cb3df80dfa545732583eccea091a0f49fdff85d4455546b2691b440acac

memory/1080-60-0x0000000000000000-mapping.dmp

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

MD5 195938a648efcaf6fcf0a1a3ccde0b7d
SHA1 475af17dfa9fb2dc370554710fc2b7a4f6bdd2e9
SHA256 b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa
SHA512 5f2415687dd44e8e9e2bcc89c1ddc077fad1d789c64f249306e0b10578029b7821588cb3df80dfa545732583eccea091a0f49fdff85d4455546b2691b440acac

Analysis: behavioral2

Detonation Overview

Submitted

2022-03-26 16:14

Reported

2022-03-26 16:19

Platform

win10v2004-en-20220113

Max time kernel

134s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.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\szbglych.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\szbglych.exe C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\szbglych.exe C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.exe

"C:\Users\Admin\AppData\Local\Temp\b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa.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\szbglych.exe

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

Network

Country Destination Domain Proto
US 52.109.12.18:443 tcp
US 20.42.65.85:443 tcp

Files

memory/3900-135-0x0000000000000000-mapping.dmp

memory/1384-136-0x0000000000000000-mapping.dmp

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

MD5 195938a648efcaf6fcf0a1a3ccde0b7d
SHA1 475af17dfa9fb2dc370554710fc2b7a4f6bdd2e9
SHA256 b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa
SHA512 5f2415687dd44e8e9e2bcc89c1ddc077fad1d789c64f249306e0b10578029b7821588cb3df80dfa545732583eccea091a0f49fdff85d4455546b2691b440acac

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

MD5 195938a648efcaf6fcf0a1a3ccde0b7d
SHA1 475af17dfa9fb2dc370554710fc2b7a4f6bdd2e9
SHA256 b275f024acde70ac070eb766969a1227ccbf34b4012dbef68d0db0d2910b3caa
SHA512 5f2415687dd44e8e9e2bcc89c1ddc077fad1d789c64f249306e0b10578029b7821588cb3df80dfa545732583eccea091a0f49fdff85d4455546b2691b440acac