Malware Analysis Report

2024-11-15 07:18

Sample ID 220708-caf4yaeed7
Target 42a599077c305dc279440b0107ad763be0217960c598e16fa74182ed2457c2d3
SHA256 42a599077c305dc279440b0107ad763be0217960c598e16fa74182ed2457c2d3
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

42a599077c305dc279440b0107ad763be0217960c598e16fa74182ed2457c2d3

Threat Level: Known bad

The file 42a599077c305dc279440b0107ad763be0217960c598e16fa74182ed2457c2d3 was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki

Kutaki Executable

Kutaki family

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

2022-07-08 01:52

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-07-08 01:52

Reported

2022-07-08 04:00

Platform

win7-20220414-en

Max time kernel

128s

Max time network

46s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.scr" /S

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

Enumerates physical storage devices

Processes

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

"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.scr" /S

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\wkeqpqch.exe

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

Network

N/A

Files

memory/1256-56-0x0000000075361000-0x0000000075363000-memory.dmp

memory/2024-57-0x0000000000000000-mapping.dmp

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

MD5 62fd0aecb02f01f3a59131ba5ae8d38a
SHA1 2c89f903ad958316ed22706c740cde7ee759247f
SHA256 bdecdba010952f854106cced016ee000bfa09dd499d66fbc43acd585c9348c29
SHA512 84ef0834069a71dc1e4b73c2a927a7357dc066ff72ef479166695d45ee631155b785c1009248b2fbb8452945f8db83f4e89e5cbbc4f974d2d7ac05f8f68e2dba

memory/460-60-0x0000000000000000-mapping.dmp

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

MD5 62fd0aecb02f01f3a59131ba5ae8d38a
SHA1 2c89f903ad958316ed22706c740cde7ee759247f
SHA256 bdecdba010952f854106cced016ee000bfa09dd499d66fbc43acd585c9348c29
SHA512 84ef0834069a71dc1e4b73c2a927a7357dc066ff72ef479166695d45ee631155b785c1009248b2fbb8452945f8db83f4e89e5cbbc4f974d2d7ac05f8f68e2dba

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

MD5 62fd0aecb02f01f3a59131ba5ae8d38a
SHA1 2c89f903ad958316ed22706c740cde7ee759247f
SHA256 bdecdba010952f854106cced016ee000bfa09dd499d66fbc43acd585c9348c29
SHA512 84ef0834069a71dc1e4b73c2a927a7357dc066ff72ef479166695d45ee631155b785c1009248b2fbb8452945f8db83f4e89e5cbbc4f974d2d7ac05f8f68e2dba

Analysis: behavioral2

Detonation Overview

Submitted

2022-07-08 01:52

Reported

2022-07-08 03:59

Platform

win10v2004-20220414-en

Max time kernel

159s

Max time network

160s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.scr" /S

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\tjqfpdch.exe N/A

Drops startup file

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

Enumerates physical storage devices

Processes

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

"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.scr" /S

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\tjqfpdch.exe

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

Network

Country Destination Domain Proto
AU 104.46.162.224:443 tcp
NL 178.79.208.1:80 tcp
NL 178.79.208.1:80 tcp
NL 178.79.208.1:80 tcp
US 8.8.8.8:53 14.110.152.52.in-addr.arpa udp

Files

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

memory/4248-133-0x0000000000000000-mapping.dmp

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

MD5 62fd0aecb02f01f3a59131ba5ae8d38a
SHA1 2c89f903ad958316ed22706c740cde7ee759247f
SHA256 bdecdba010952f854106cced016ee000bfa09dd499d66fbc43acd585c9348c29
SHA512 84ef0834069a71dc1e4b73c2a927a7357dc066ff72ef479166695d45ee631155b785c1009248b2fbb8452945f8db83f4e89e5cbbc4f974d2d7ac05f8f68e2dba

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

MD5 62fd0aecb02f01f3a59131ba5ae8d38a
SHA1 2c89f903ad958316ed22706c740cde7ee759247f
SHA256 bdecdba010952f854106cced016ee000bfa09dd499d66fbc43acd585c9348c29
SHA512 84ef0834069a71dc1e4b73c2a927a7357dc066ff72ef479166695d45ee631155b785c1009248b2fbb8452945f8db83f4e89e5cbbc4f974d2d7ac05f8f68e2dba