Malware Analysis Report

2024-11-30 11:26

Sample ID 211119-p6x4jsddc3
Target Tax Payment Challan.exe
SHA256 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41
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

5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41

Threat Level: Known bad

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

Malicious Activity Summary

kutaki keylogger stealer

Kutaki Executable

Kutaki

Kutaki family

Executes dropped EXE

Drops startup file

Loads dropped DLL

Drops file in Windows directory

Enumerates physical storage devices

Modifies Internet Explorer settings

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

2021-11-19 12:57

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2021-11-19 12:57

Reported

2021-11-19 12:59

Platform

win7-en-20211014

Max time kernel

150s

Max time network

122s

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
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\jmvuioch.exe N/A

Drops startup file

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

Enumerates physical storage devices

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Internet Explorer\Main C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A

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\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.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\jmvuioch.exe

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

C:\Windows\SysWOW64\DllHost.exe

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

Network

N/A

Files

memory/1864-55-0x0000000000260000-0x0000000000266000-memory.dmp

memory/1864-56-0x0000000000260000-0x000000000026A000-memory.dmp

memory/1864-57-0x0000000075B71000-0x0000000075B73000-memory.dmp

memory/856-58-0x0000000000000000-mapping.dmp

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

MD5 cca90533c2283834f8d53977f1dfde3b
SHA1 579d3991a8b5f3a71d615cbd9d64832dd88db2e1
SHA256 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41
SHA512 ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc

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

MD5 cca90533c2283834f8d53977f1dfde3b
SHA1 579d3991a8b5f3a71d615cbd9d64832dd88db2e1
SHA256 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41
SHA512 ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc

memory/1120-62-0x0000000000000000-mapping.dmp

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

MD5 cca90533c2283834f8d53977f1dfde3b
SHA1 579d3991a8b5f3a71d615cbd9d64832dd88db2e1
SHA256 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41
SHA512 ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc

memory/1120-64-0x0000000000220000-0x0000000000226000-memory.dmp

memory/1120-65-0x0000000000220000-0x000000000022A000-memory.dmp

memory/856-68-0x00000000020B0000-0x00000000020B2000-memory.dmp

memory/1428-69-0x0000000000120000-0x0000000000122000-memory.dmp

memory/1428-70-0x0000000000280000-0x0000000000281000-memory.dmp

memory/1120-71-0x0000000003FA1000-0x0000000004E4D000-memory.dmp

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

MD5 cca90533c2283834f8d53977f1dfde3b
SHA1 579d3991a8b5f3a71d615cbd9d64832dd88db2e1
SHA256 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41
SHA512 ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc

Analysis: behavioral2

Detonation Overview

Submitted

2021-11-19 12:57

Reported

2021-11-19 12:59

Platform

win10-en-20211104

Max time kernel

124s

Max time network

121s

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\gegxwach.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gegxwach.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\gegxwach.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-1-5-21-1042495040-510797905-2613508344-1000_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\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:\windows\system32\svchost.exe

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 time.windows.com udp
NL 20.101.57.9:123 time.windows.com udp
US 8.8.8.8:53 ts-crl.ws.symantec.com udp
US 72.21.91.29:80 ts-crl.ws.symantec.com tcp

Files

memory/980-120-0x0000000000000000-mapping.dmp

memory/2540-121-0x0000000000000000-mapping.dmp

memory/1332-122-0x0000000000000000-mapping.dmp

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

MD5 cca90533c2283834f8d53977f1dfde3b
SHA1 579d3991a8b5f3a71d615cbd9d64832dd88db2e1
SHA256 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41
SHA512 ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc

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

MD5 cca90533c2283834f8d53977f1dfde3b
SHA1 579d3991a8b5f3a71d615cbd9d64832dd88db2e1
SHA256 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41
SHA512 ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc