Malware Analysis Report

2024-11-30 11:23

Sample ID 220508-2ecdzshch2
Target 7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6
SHA256 7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6
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

7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6

Threat Level: Known bad

The file 7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6 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 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

119s

Max time network

50s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.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\sswjtdch.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.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\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1096 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe C:\Windows\SysWOW64\cmd.exe
PID 1096 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe C:\Windows\SysWOW64\cmd.exe
PID 1096 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe C:\Windows\SysWOW64\cmd.exe
PID 1096 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe C:\Windows\SysWOW64\cmd.exe
PID 1096 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe
PID 1096 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe
PID 1096 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe
PID 1096 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sswjtdch.exe

Processes

C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe

"C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.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\sswjtdch.exe

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

Network

N/A

Files

memory/1096-57-0x0000000075FE1000-0x0000000075FE3000-memory.dmp

memory/1712-58-0x0000000000000000-mapping.dmp

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

MD5 e184e10181e18e7a761530dccb296bd7
SHA1 852260f0776d884678ba949957f31a8da3edb71e
SHA256 7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6
SHA512 7bb7e0c4857eda2782a4e8c2342a2d8dfd6b70df1900ae5443600ae379f7d20efb5100f9992a009d6c12be56054f4afd1d611d0d29574a163b396894612047c1

memory/1932-61-0x0000000000000000-mapping.dmp

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

MD5 e184e10181e18e7a761530dccb296bd7
SHA1 852260f0776d884678ba949957f31a8da3edb71e
SHA256 7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6
SHA512 7bb7e0c4857eda2782a4e8c2342a2d8dfd6b70df1900ae5443600ae379f7d20efb5100f9992a009d6c12be56054f4afd1d611d0d29574a163b396894612047c1

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

MD5 e184e10181e18e7a761530dccb296bd7
SHA1 852260f0776d884678ba949957f31a8da3edb71e
SHA256 7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6
SHA512 7bb7e0c4857eda2782a4e8c2342a2d8dfd6b70df1900ae5443600ae379f7d20efb5100f9992a009d6c12be56054f4afd1d611d0d29574a163b396894612047c1

Analysis: behavioral2

Detonation Overview

Submitted

2022-05-08 22:29

Reported

2022-05-09 00:29

Platform

win10v2004-20220414-en

Max time kernel

165s

Max time network

178s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.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\fgzvtsch.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fgzvtsch.exe C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fgzvtsch.exe C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.exe

"C:\Users\Admin\AppData\Local\Temp\7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6.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\fgzvtsch.exe

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

Network

Country Destination Domain Proto
NL 104.110.191.133:80 tcp
US 20.189.173.2:443 tcp
NL 178.79.208.1:80 tcp
NL 178.79.208.1:80 tcp

Files

memory/392-136-0x0000000000000000-mapping.dmp

memory/3416-137-0x0000000000000000-mapping.dmp

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

MD5 e184e10181e18e7a761530dccb296bd7
SHA1 852260f0776d884678ba949957f31a8da3edb71e
SHA256 7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6
SHA512 7bb7e0c4857eda2782a4e8c2342a2d8dfd6b70df1900ae5443600ae379f7d20efb5100f9992a009d6c12be56054f4afd1d611d0d29574a163b396894612047c1

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

MD5 e184e10181e18e7a761530dccb296bd7
SHA1 852260f0776d884678ba949957f31a8da3edb71e
SHA256 7c1b70174d26b365555d457f7f564bd3bde4e66d84fd9b0d49b12fffa62daac6
SHA512 7bb7e0c4857eda2782a4e8c2342a2d8dfd6b70df1900ae5443600ae379f7d20efb5100f9992a009d6c12be56054f4afd1d611d0d29574a163b396894612047c1