Malware Analysis Report

2024-11-30 11:24

Sample ID 220528-brrfkabgg8
Target 032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e
SHA256 032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e
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

032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e

Threat Level: Known bad

The file 032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki Executable

Kutaki

Kutaki family

Executes dropped EXE

Loads dropped DLL

Drops startup file

Maps connected drives based on registry

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-05-28 01:22

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-05-28 01:22

Reported

2022-05-28 03:52

Platform

win7-20220414-en

Max time kernel

107s

Max time network

50s

Command Line

"C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.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\fepsudch.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.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\fepsudch.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.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\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1984 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe C:\Windows\SysWOW64\cmd.exe
PID 1984 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe C:\Windows\SysWOW64\cmd.exe
PID 1984 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe C:\Windows\SysWOW64\cmd.exe
PID 1984 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe C:\Windows\SysWOW64\cmd.exe
PID 1984 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe
PID 1984 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe
PID 1984 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe
PID 1984 wrote to memory of 1752 N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fepsudch.exe

Processes

C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe

"C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.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\fepsudch.exe

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

Network

N/A

Files

memory/1984-56-0x0000000076571000-0x0000000076573000-memory.dmp

memory/2032-57-0x0000000000000000-mapping.dmp

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

MD5 5f27bb40eb33d56669235b43214ed7b9
SHA1 9b9326e6771a1e5130c47664a984a8112ebf826c
SHA256 032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e
SHA512 ae49f24963e3b8dc093f6db313658659bbb73c805c91f0a271126b41146c19c3fe94be705c30614d9e996e55ba874536fe70badccc8a11aa04af9ee65b982d9f

memory/1752-60-0x0000000000000000-mapping.dmp

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

MD5 5f27bb40eb33d56669235b43214ed7b9
SHA1 9b9326e6771a1e5130c47664a984a8112ebf826c
SHA256 032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e
SHA512 ae49f24963e3b8dc093f6db313658659bbb73c805c91f0a271126b41146c19c3fe94be705c30614d9e996e55ba874536fe70badccc8a11aa04af9ee65b982d9f

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

MD5 5f27bb40eb33d56669235b43214ed7b9
SHA1 9b9326e6771a1e5130c47664a984a8112ebf826c
SHA256 032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e
SHA512 ae49f24963e3b8dc093f6db313658659bbb73c805c91f0a271126b41146c19c3fe94be705c30614d9e996e55ba874536fe70badccc8a11aa04af9ee65b982d9f

Analysis: behavioral2

Detonation Overview

Submitted

2022-05-28 01:22

Reported

2022-05-28 03:52

Platform

win10v2004-20220414-en

Max time kernel

111s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe"

Signatures

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe

"C:\Users\Admin\AppData\Local\Temp\032f83f031fb5615cf82d5aae71e8cd20fe8efe741890aab85cf8856398b768e.exe"

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
GB 51.132.193.105:443 tcp
US 8.253.208.112:80 tcp
US 8.253.208.112:80 tcp
US 8.253.208.112:80 tcp
FR 2.18.109.224:443 tcp
US 104.18.24.243:80 tcp

Files

N/A