Analysis Overview
SHA256
fbc0263ae8cef48b184cfee870c2f5f4ee3c5006ffb0090cc3f024486628a4eb
Threat Level: Known bad
The file Tax Payment Invoice.exe was found to be: Known bad.
Malicious Activity Summary
Kutaki Executable
Kutaki
Kutaki family
Executes dropped EXE
Drops startup file
Checks computer location settings
Loads dropped DLL
Drops file in Windows directory
Enumerates physical storage devices
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-07-29 20:55
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2022-07-29 20:55
Reported
2022-07-29 20:57
Platform
win7-20220718-en
Max time kernel
108s
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\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 Invoice.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 Invoice.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Invoice.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Invoice.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
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Tax Payment Invoice.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment Invoice.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
Files
memory/1208-56-0x00000000758D1000-0x00000000758D3000-memory.dmp
memory/1324-57-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
| MD5 | bba7a2ee3cc8f1b19f25cf46a2c35b24 |
| SHA1 | f62736f38dc27ed47bd89c75eff750ef1d2fb8e4 |
| SHA256 | fbc0263ae8cef48b184cfee870c2f5f4ee3c5006ffb0090cc3f024486628a4eb |
| SHA512 | 0bbcc177b77f01d3e65faff0c0913562270b580cc86a3b944fb53750484e0231160f4947492ac34257df3cfbdab4ea080cc7826aa7ff5dac4d5fecc8bbaa512d |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
| MD5 | bba7a2ee3cc8f1b19f25cf46a2c35b24 |
| SHA1 | f62736f38dc27ed47bd89c75eff750ef1d2fb8e4 |
| SHA256 | fbc0263ae8cef48b184cfee870c2f5f4ee3c5006ffb0090cc3f024486628a4eb |
| SHA512 | 0bbcc177b77f01d3e65faff0c0913562270b580cc86a3b944fb53750484e0231160f4947492ac34257df3cfbdab4ea080cc7826aa7ff5dac4d5fecc8bbaa512d |
memory/1100-60-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
| MD5 | bba7a2ee3cc8f1b19f25cf46a2c35b24 |
| SHA1 | f62736f38dc27ed47bd89c75eff750ef1d2fb8e4 |
| SHA256 | fbc0263ae8cef48b184cfee870c2f5f4ee3c5006ffb0090cc3f024486628a4eb |
| SHA512 | 0bbcc177b77f01d3e65faff0c0913562270b580cc86a3b944fb53750484e0231160f4947492ac34257df3cfbdab4ea080cc7826aa7ff5dac4d5fecc8bbaa512d |
Analysis: behavioral2
Detonation Overview
Submitted
2022-07-29 20:55
Reported
2022-07-29 20:57
Platform
win10v2004-20220721-en
Max time kernel
151s
Max time network
146s
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\ch.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\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 Invoice.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 Invoice.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-1-5-21-1101907861-274115917-2188613224-1000_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 |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Invoice.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Invoice.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Invoice.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:\Windows\SysWOW64\mspaint.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:\Windows\SysWOW64\mspaint.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\mspaint.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\mspaint.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Tax Payment Invoice.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment Invoice.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\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 -p -s DeviceAssociationService
Network
| Country | Destination | Domain | Proto |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 52.168.112.67:443 | tcp | |
| US | 8.8.8.8:53 | 164.2.77.40.in-addr.arpa | udp |
| US | 209.197.3.8:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp |
Files
memory/828-132-0x0000000000000000-mapping.dmp
memory/832-133-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
| MD5 | bba7a2ee3cc8f1b19f25cf46a2c35b24 |
| SHA1 | f62736f38dc27ed47bd89c75eff750ef1d2fb8e4 |
| SHA256 | fbc0263ae8cef48b184cfee870c2f5f4ee3c5006ffb0090cc3f024486628a4eb |
| SHA512 | 0bbcc177b77f01d3e65faff0c0913562270b580cc86a3b944fb53750484e0231160f4947492ac34257df3cfbdab4ea080cc7826aa7ff5dac4d5fecc8bbaa512d |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
| MD5 | bba7a2ee3cc8f1b19f25cf46a2c35b24 |
| SHA1 | f62736f38dc27ed47bd89c75eff750ef1d2fb8e4 |
| SHA256 | fbc0263ae8cef48b184cfee870c2f5f4ee3c5006ffb0090cc3f024486628a4eb |
| SHA512 | 0bbcc177b77f01d3e65faff0c0913562270b580cc86a3b944fb53750484e0231160f4947492ac34257df3cfbdab4ea080cc7826aa7ff5dac4d5fecc8bbaa512d |
memory/3896-138-0x0000000000000000-mapping.dmp