Analysis Overview
SHA256
b5d3d965444fd3e7a0df7821d7ac2343dd3e4feb9fcd12e2be0910cee2b51850
Threat Level: Known bad
The file RTGS_Payment.zip was found to be: Known bad.
Malicious Activity Summary
Kutaki family
Kutaki
Kutaki Executable
Executes dropped EXE
Drops startup file
Loads dropped DLL
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-07-11 07:51
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2022-07-11 07:51
Reported
2022-07-11 07:57
Platform
win7-20220414-en
Max time kernel
150s
Max time network
45s
Command Line
Signatures
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\gxquench.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\gxquench.exe | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gxquench.exe | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | N/A |
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe
"C:\Users\Admin\AppData\Local\Temp\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\gxquench.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gxquench.exe"
Network
Files
memory/1944-56-0x0000000075DE1000-0x0000000075DE3000-memory.dmp
memory/1792-57-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gxquench.exe
| MD5 | a6e5804f4d6a9a2a823a70ad37db3716 |
| SHA1 | f20ce20488fb607162285b0ccac95bc965bf116d |
| SHA256 | 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743 |
| SHA512 | cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be |
memory/1824-60-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gxquench.exe
| MD5 | a6e5804f4d6a9a2a823a70ad37db3716 |
| SHA1 | f20ce20488fb607162285b0ccac95bc965bf116d |
| SHA256 | 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743 |
| SHA512 | cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gxquench.exe
| MD5 | a6e5804f4d6a9a2a823a70ad37db3716 |
| SHA1 | f20ce20488fb607162285b0ccac95bc965bf116d |
| SHA256 | 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743 |
| SHA512 | cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be |
Analysis: behavioral2
Detonation Overview
Submitted
2022-07-11 07:51
Reported
2022-07-11 07:57
Platform
win10v2004-20220414-en
Max time kernel
281s
Max time network
294s
Command Line
Signatures
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\nmbdepch.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | N/A |
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2596 wrote to memory of 3688 | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2596 wrote to memory of 3688 | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2596 wrote to memory of 3688 | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2596 wrote to memory of 4996 | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe |
| PID 2596 wrote to memory of 4996 | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe |
| PID 2596 wrote to memory of 4996 | N/A | C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\RTGS_Payment.exe
"C:\Users\Admin\AppData\Local\Temp\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\nmbdepch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe"
Network
| Country | Destination | Domain | Proto |
| NL | 8.248.1.254:80 | tcp | |
| NL | 52.178.17.3:443 | tcp | |
| IE | 20.54.110.249:443 | tcp | |
| NL | 104.97.14.80:80 | tcp | |
| NL | 104.97.14.81:80 | tcp | |
| US | 13.107.21.200:443 | tcp |
Files
memory/3688-132-0x0000000000000000-mapping.dmp
memory/4996-133-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe
| MD5 | a6e5804f4d6a9a2a823a70ad37db3716 |
| SHA1 | f20ce20488fb607162285b0ccac95bc965bf116d |
| SHA256 | 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743 |
| SHA512 | cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nmbdepch.exe
| MD5 | a6e5804f4d6a9a2a823a70ad37db3716 |
| SHA1 | f20ce20488fb607162285b0ccac95bc965bf116d |
| SHA256 | 5f7e2c3aca868d28e2321913fee896d84b6e648e9289c2dacecd5bf85f7ee743 |
| SHA512 | cdea1a027cb63173035c4d0d681ad1bd0c63bb2f0a722d6d5316aaae9e474b2e9d0b21cf7f74388ff348133deab4aab92f431d125db79e8134b98d93c26ba4be |