Malware Analysis Report

2024-11-30 11:23

Sample ID 220508-2d99mahcg8
Target 7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce
SHA256 7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce
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

7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce

Threat Level: Known bad

The file 7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki

Kutaki Executable

Kutaki family

Executes dropped EXE

Drops startup file

Loads dropped DLL

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-05-08 22:29

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-05-08 22:29

Reported

2022-05-09 00:29

Platform

win7-20220414-en

Max time kernel

99s

Max time network

46s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.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\nbrgaech.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.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\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1928 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe C:\Windows\SysWOW64\cmd.exe
PID 1928 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe C:\Windows\SysWOW64\cmd.exe
PID 1928 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe C:\Windows\SysWOW64\cmd.exe
PID 1928 wrote to memory of 1956 N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe C:\Windows\SysWOW64\cmd.exe
PID 1928 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe
PID 1928 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe
PID 1928 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe
PID 1928 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbrgaech.exe

Processes

C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe

"C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.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\nbrgaech.exe

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

Network

N/A

Files

memory/1928-57-0x0000000076721000-0x0000000076723000-memory.dmp

memory/1956-58-0x0000000000000000-mapping.dmp

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

MD5 8f83cdb6e2b59fd44ec017d706ba0cfb
SHA1 bae3855ba40c2c9854d357c335a79a41242ea92e
SHA256 7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce
SHA512 23397905fa31dc0701389c8b6127f271f4dafb23a6e7ac64e594bd366b3dcc16ade37fbef9bbcb3d5d560b2ba1e192696034cf9a3dc7ef92634cac8796815675

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

MD5 8f83cdb6e2b59fd44ec017d706ba0cfb
SHA1 bae3855ba40c2c9854d357c335a79a41242ea92e
SHA256 7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce
SHA512 23397905fa31dc0701389c8b6127f271f4dafb23a6e7ac64e594bd366b3dcc16ade37fbef9bbcb3d5d560b2ba1e192696034cf9a3dc7ef92634cac8796815675

memory/956-61-0x0000000000000000-mapping.dmp

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

MD5 8f83cdb6e2b59fd44ec017d706ba0cfb
SHA1 bae3855ba40c2c9854d357c335a79a41242ea92e
SHA256 7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce
SHA512 23397905fa31dc0701389c8b6127f271f4dafb23a6e7ac64e594bd366b3dcc16ade37fbef9bbcb3d5d560b2ba1e192696034cf9a3dc7ef92634cac8796815675

Analysis: behavioral2

Detonation Overview

Submitted

2022-05-08 22:29

Reported

2022-05-09 00:29

Platform

win10v2004-20220414-en

Max time kernel

149s

Max time network

169s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.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\sygveych.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sygveych.exe C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sygveych.exe C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.exe

"C:\Users\Admin\AppData\Local\Temp\7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce.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\sygveych.exe

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

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
US 13.107.21.200:443 tcp
NL 104.97.14.81:80 tcp
IE 20.54.110.249:443 tcp
NL 104.97.14.80:80 tcp
NL 104.97.14.80:80 tcp
US 20.42.65.89:443 tcp
US 8.8.8.8:53 storesdk.dsx.mp.microsoft.com udp
FR 2.18.109.224:443 storesdk.dsx.mp.microsoft.com tcp

Files

memory/4604-133-0x0000000000000000-mapping.dmp

memory/452-134-0x0000000000000000-mapping.dmp

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

MD5 8f83cdb6e2b59fd44ec017d706ba0cfb
SHA1 bae3855ba40c2c9854d357c335a79a41242ea92e
SHA256 7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce
SHA512 23397905fa31dc0701389c8b6127f271f4dafb23a6e7ac64e594bd366b3dcc16ade37fbef9bbcb3d5d560b2ba1e192696034cf9a3dc7ef92634cac8796815675

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

MD5 8f83cdb6e2b59fd44ec017d706ba0cfb
SHA1 bae3855ba40c2c9854d357c335a79a41242ea92e
SHA256 7c60245a65725dc1b28bf82709a4b292b729586da6a86ff9091cde5059b4a4ce
SHA512 23397905fa31dc0701389c8b6127f271f4dafb23a6e7ac64e594bd366b3dcc16ade37fbef9bbcb3d5d560b2ba1e192696034cf9a3dc7ef92634cac8796815675