Malware Analysis Report

2024-11-15 07:18

Sample ID 220703-man5nahah7
Target 3b998760d65dba0cf8820f4743bda79310dea60a0926460f613ee4d90fa0c720
SHA256 3b998760d65dba0cf8820f4743bda79310dea60a0926460f613ee4d90fa0c720
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

3b998760d65dba0cf8820f4743bda79310dea60a0926460f613ee4d90fa0c720

Threat Level: Known bad

The file 3b998760d65dba0cf8820f4743bda79310dea60a0926460f613ee4d90fa0c720 was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki Executable

Kutaki family

Kutaki

Executes dropped EXE

Drops startup file

Loads dropped DLL

Maps connected drives based on registry

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-07-03 10:15

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-07-03 10:15

Reported

2022-07-03 10:58

Platform

win7-20220414-en

Max time kernel

125s

Max time network

52s

Command Line

"C:\Users\Admin\AppData\Local\Temp\TDS Challan.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\kwtrutch.exe N/A

Drops startup file

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

Loads dropped DLL

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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe

"C:\Users\Admin\AppData\Local\Temp\TDS Challan.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\kwtrutch.exe

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

Network

N/A

Files

memory/632-56-0x0000000075391000-0x0000000075393000-memory.dmp

memory/992-57-0x0000000000000000-mapping.dmp

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

MD5 1ba628a1b76f3a2f4133f94c7c18f91c
SHA1 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
SHA256 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
SHA512 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24

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

MD5 1ba628a1b76f3a2f4133f94c7c18f91c
SHA1 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
SHA256 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
SHA512 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24

memory/1036-60-0x0000000000000000-mapping.dmp

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

MD5 1ba628a1b76f3a2f4133f94c7c18f91c
SHA1 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
SHA256 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
SHA512 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24

Analysis: behavioral2

Detonation Overview

Submitted

2022-07-03 10:15

Reported

2022-07-03 10:58

Platform

win10v2004-20220414-en

Max time kernel

151s

Max time network

134s

Command Line

"C:\Users\Admin\AppData\Local\Temp\TDS Challan.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\yrzvowch.exe N/A

Drops startup file

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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe

"C:\Users\Admin\AppData\Local\Temp\TDS Challan.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\yrzvowch.exe

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

Network

Country Destination Domain Proto
NL 20.50.201.200:443 tcp
NL 67.26.111.254:80 tcp
NL 67.26.111.254:80 tcp
NL 67.26.111.254:80 tcp

Files

memory/4836-132-0x0000000000000000-mapping.dmp

memory/4432-133-0x0000000000000000-mapping.dmp

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

MD5 1ba628a1b76f3a2f4133f94c7c18f91c
SHA1 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
SHA256 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
SHA512 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24

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

MD5 1ba628a1b76f3a2f4133f94c7c18f91c
SHA1 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
SHA256 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
SHA512 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24