Malware Analysis Report

2024-11-15 07:18

Sample ID 220711-nz8q2aggen
Target RTGS_Payment.zip
SHA256 b5d3d965444fd3e7a0df7821d7ac2343dd3e4feb9fcd12e2be0910cee2b51850
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 Overview

score
10/10

SHA256

b5d3d965444fd3e7a0df7821d7ac2343dd3e4feb9fcd12e2be0910cee2b51850

Threat Level: Known bad

The file RTGS_Payment.zip was found to be: Known bad.

Malicious Activity Summary

kutaki keylogger stealer

Kutaki

Kutaki Executable

Kutaki family

Executes dropped EXE

Drops startup file

Enumerates physical storage devices

Kills process with taskkill

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-07-11 11:51

Signatures

Kutaki Executable

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

Kutaki family

kutaki

Analysis: behavioral1

Detonation Overview

Submitted

2022-07-11 11:51

Reported

2022-07-11 11:54

Platform

win10v2004-20220414-en

Max time kernel

134s

Max time network

142s

Command Line

C:\Windows\Explorer.exe /idlist,,C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.zip

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
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
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe C:\Users\Admin\Desktop\RTGS_Payment.exe N/A

Enumerates physical storage devices

Kills process with taskkill

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeRestorePrivilege N/A C:\Program Files\7-Zip\7zFM.exe N/A
Token: 35 N/A C:\Program Files\7-Zip\7zFM.exe N/A
Token: SeSecurityPrivilege N/A C:\Program Files\7-Zip\7zFM.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A
N/A N/A C:\Program Files\7-Zip\7zFM.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\Desktop\RTGS_Payment.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2440 wrote to memory of 2396 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\cmd.exe
PID 2440 wrote to memory of 2396 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\cmd.exe
PID 2440 wrote to memory of 2396 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\cmd.exe
PID 2440 wrote to memory of 2256 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe
PID 2440 wrote to memory of 2256 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe
PID 2440 wrote to memory of 2256 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe
PID 2244 wrote to memory of 4868 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\cmd.exe
PID 2244 wrote to memory of 4868 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\cmd.exe
PID 2244 wrote to memory of 4868 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\cmd.exe
PID 2244 wrote to memory of 2516 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\taskkill.exe
PID 2244 wrote to memory of 2516 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\taskkill.exe
PID 2244 wrote to memory of 2516 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\taskkill.exe
PID 2244 wrote to memory of 3780 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe
PID 2244 wrote to memory of 3780 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe
PID 2244 wrote to memory of 3780 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe
PID 1424 wrote to memory of 3108 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\Desktop\RTGS_Payment.exe
PID 1424 wrote to memory of 3108 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\Desktop\RTGS_Payment.exe
PID 1424 wrote to memory of 3108 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\Desktop\RTGS_Payment.exe
PID 3108 wrote to memory of 4752 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\cmd.exe
PID 3108 wrote to memory of 4752 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\cmd.exe
PID 3108 wrote to memory of 4752 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\cmd.exe
PID 3108 wrote to memory of 2184 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\taskkill.exe
PID 3108 wrote to memory of 2184 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\taskkill.exe
PID 3108 wrote to memory of 2184 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Windows\SysWOW64\taskkill.exe
PID 3108 wrote to memory of 4428 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe
PID 3108 wrote to memory of 4428 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe
PID 3108 wrote to memory of 4428 N/A C:\Users\Admin\Desktop\RTGS_Payment.exe C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qasjajch.exe

Processes

C:\Windows\Explorer.exe

C:\Windows\Explorer.exe /idlist,,C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.zip

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

C:\Program Files\7-Zip\7zFM.exe

"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.zip"

C:\Users\Admin\Desktop\RTGS_Payment.exe

"C:\Users\Admin\Desktop\RTGS_Payment.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\qasjajch.exe

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

C:\Users\Admin\Desktop\RTGS_Payment.exe

"C:\Users\Admin\Desktop\RTGS_Payment.exe"

C:\Users\Admin\Desktop\RTGS_Payment.exe

"C:\Users\Admin\Desktop\RTGS_Payment.exe"

C:\Windows\SysWOW64\cmd.exe

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

C:\Users\Admin\Desktop\RTGS_Payment.exe

"C:\Users\Admin\Desktop\RTGS_Payment.exe"

C:\Windows\SysWOW64\taskkill.exe

taskkill /im qasjajch.exe /f

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

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

C:\Windows\system32\cmd.exe

"C:\Windows\system32\cmd.exe"

C:\Users\Admin\Desktop\RTGS_Payment.exe

RTGS_Payment.exe

C:\Windows\SysWOW64\cmd.exe

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

C:\Windows\SysWOW64\taskkill.exe

taskkill /im qasjajch.exe /f

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

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

Network

Country Destination Domain Proto
US 8.253.208.113:80 tcp
IE 20.50.73.9:443 tcp
US 8.253.208.113:80 tcp
US 8.253.208.113:80 tcp
US 8.253.208.113:80 tcp
US 204.79.197.200:443 tcp
US 8.8.8.8:53 s-ring.msedge.net udp
US 13.107.3.254:443 s-ring.msedge.net tcp
US 8.8.8.8:53 amsr2.msedge.net udp
NL 104.212.67.181:443 amsr2.msedge.net tcp
NL 104.212.67.181:443 amsr2.msedge.net tcp

Files

C:\Users\Admin\Desktop\RTGS_Payment.exe

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be

C:\Users\Admin\Desktop\RTGS_Payment.exe

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be

memory/2396-134-0x0000000000000000-mapping.dmp

memory/2256-135-0x0000000000000000-mapping.dmp

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

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be

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

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be

C:\Users\Admin\Desktop\RTGS_Payment.exe

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be

C:\Users\Admin\Desktop\RTGS_Payment.exe

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be

memory/4868-146-0x0000000000000000-mapping.dmp

memory/2516-148-0x0000000000000000-mapping.dmp

C:\Users\Admin\Desktop\RTGS_Payment.exe

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be

memory/3780-151-0x0000000000000000-mapping.dmp

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

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be

memory/3108-155-0x0000000000000000-mapping.dmp

C:\Users\Admin\Desktop\RTGS_Payment.exe

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be

memory/4752-159-0x0000000000000000-mapping.dmp

memory/2184-160-0x0000000000000000-mapping.dmp

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

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be

memory/4428-162-0x0000000000000000-mapping.dmp

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

MD5 a6e5804f4d6a9a2a823a70ad37db3716
SHA1 f20ce20488fb607162285b0ccac95bc965bf116d
SHA256 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743
SHA512 cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be