Malware Analysis Report

2024-11-13 14:55

Sample ID 220722-fjet1scff3
Target Tax Payment Challan.exe
SHA256 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a
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

4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a

Threat Level: Known bad

The file Tax Payment Challan.exe was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki

Kutaki family

Kutaki Executable

Executes dropped EXE

Drops startup file

Loads dropped DLL

Checks computer location settings

Drops file in Windows directory

Enumerates physical storage devices

Suspicious use of FindShellTrayWindow

Modifies registry class

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-07-22 04:53

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-07-22 04:53

Reported

2022-07-22 04:56

Platform

win7-20220718-en

Max time kernel

113s

Max time network

45s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Tax Payment 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\ch.exe N/A

Drops startup file

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

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\Tax Payment Challan.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe

"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe"

C:\Windows\SysWOW64\cmd.exe

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

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

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

C:\Windows\SysWOW64\DllHost.exe

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

Network

N/A

Files

memory/1668-56-0x0000000075B61000-0x0000000075B63000-memory.dmp

memory/1240-57-0x0000000000000000-mapping.dmp

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

MD5 d25f259e5943e02244d5a6fb3cc9b778
SHA1 ae4c93a5264acdf26a11cd9165f7382afceedb50
SHA256 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a
SHA512 8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019

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

MD5 d25f259e5943e02244d5a6fb3cc9b778
SHA1 ae4c93a5264acdf26a11cd9165f7382afceedb50
SHA256 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a
SHA512 8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019

memory/1652-61-0x0000000000000000-mapping.dmp

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

MD5 d25f259e5943e02244d5a6fb3cc9b778
SHA1 ae4c93a5264acdf26a11cd9165f7382afceedb50
SHA256 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a
SHA512 8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019

memory/1652-66-0x00000000028D0000-0x000000000338A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-07-22 04:53

Reported

2022-07-22 04:56

Platform

win10v2004-20220721-en

Max time kernel

125s

Max time network

61s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Tax Payment 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\ch.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation C:\Windows\SysWOW64\cmd.exe N/A

Drops startup file

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

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-1-5-21-2372564722-193526734-2636556182-1000_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\Tax Payment Challan.exe

"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe"

C:\Windows\SysWOW64\cmd.exe

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

C:\Windows\SysWOW64\mspaint.exe

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

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

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

C:\Windows\system32\svchost.exe

C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService

Network

Country Destination Domain Proto
FR 2.18.109.224:443 tcp
US 20.42.65.89:443 tcp

Files

memory/3428-132-0x0000000000000000-mapping.dmp

memory/376-133-0x0000000000000000-mapping.dmp

memory/4328-134-0x0000000000000000-mapping.dmp

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

MD5 d25f259e5943e02244d5a6fb3cc9b778
SHA1 ae4c93a5264acdf26a11cd9165f7382afceedb50
SHA256 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a
SHA512 8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019

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

MD5 d25f259e5943e02244d5a6fb3cc9b778
SHA1 ae4c93a5264acdf26a11cd9165f7382afceedb50
SHA256 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a
SHA512 8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019