Malware Analysis Report

2024-11-30 11:26

Sample ID 211124-rez5yachap
Target GST-48B3.cmd
SHA256 064fe665dce5b2cf6d824290c2fdebea593f26b0c4b05efbdd3e300ab926900f
Tags
kutaki
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

064fe665dce5b2cf6d824290c2fdebea593f26b0c4b05efbdd3e300ab926900f

Threat Level: Known bad

The file GST-48B3.cmd was found to be: Known bad.

Malicious Activity Summary

kutaki

Kutaki Executable

Kutaki family

Drops file in Windows directory

Enumerates physical storage devices

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Modifies registry class

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-11-24 14:07

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2021-11-24 14:07

Reported

2021-11-24 14:09

Platform

win7-en-20211014

Max time kernel

119s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe"

Signatures

Enumerates physical storage devices

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\DllHost.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe

"C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /c C:\Users\Admin\AppData\Local\Temp\Receipt.bmp

C:\Windows\SysWOW64\DllHost.exe

C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}

Network

N/A

Files

memory/660-55-0x0000000000260000-0x0000000000266000-memory.dmp

memory/660-56-0x0000000000260000-0x000000000026A000-memory.dmp

memory/660-57-0x00000000758C1000-0x00000000758C3000-memory.dmp

memory/760-58-0x0000000000000000-mapping.dmp

memory/760-61-0x0000000000580000-0x0000000000582000-memory.dmp

memory/1420-62-0x0000000000170000-0x0000000000172000-memory.dmp

memory/1420-63-0x0000000000220000-0x0000000000221000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-11-24 14:07

Reported

2021-11-24 14:09

Platform

win10-en-20211104

Max time kernel

119s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe"

Signatures

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Debug\WIA\wiatrace.log C:\Windows\SysWOW64\mspaint.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000_Classes\Local Settings C:\Windows\SysWOW64\cmd.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\mspaint.exe N/A
N/A N/A C:\Windows\SysWOW64\mspaint.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe

"C:\Users\Admin\AppData\Local\Temp\GST-48B3.cmd.exe"

C:\Windows\SysWOW64\cmd.exe

cmd.exe /c C:\Users\Admin\AppData\Local\Temp\Receipt.bmp

C:\Windows\SysWOW64\mspaint.exe

"C:\Windows\system32\mspaint.exe" "C:\Users\Admin\AppData\Local\Temp\Receipt.bmp"

\??\c:\windows\system32\svchost.exe

c:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s DeviceAssociationService

Network

Files

memory/2436-118-0x00000000001E0000-0x00000000001E6000-memory.dmp

memory/2436-119-0x00000000001E0000-0x00000000001EA000-memory.dmp

memory/3476-120-0x0000000000000000-mapping.dmp

memory/3348-121-0x0000000000000000-mapping.dmp