Analysis Overview
SHA256
d7d03d5c9764d32560fbd5b0cdbae78d61cdf66ae7f81031fb1505d355fc978c
Threat Level: Known bad
The file 0580c88e5ec1b9a64b1cdf8aa20d1886 was found to be: Known bad.
Malicious Activity Summary
Kutaki Executable
Kutaki family
Kutaki
Executes dropped EXE
Loads dropped DLL
Drops startup file
Drops file in Windows directory
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Modifies registry class
Modifies Internet Explorer settings
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-12-01 09:17
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2021-12-01 09:17
Reported
2021-12-01 09:19
Platform
win7-en-20211104
Max time kernel
150s
Max time network
119s
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 |
| 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\riptxach.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\riptxach.exe | C:\Users\Admin\AppData\Local\Temp\Tax Payment.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\riptxach.exe | C:\Users\Admin\AppData\Local\Temp\Tax Payment.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment.exe | N/A |
Enumerates physical storage devices
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-103686315-404690609-2047157615-1000\Software\Microsoft\Internet Explorer\Main | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\riptxach.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
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Tax Payment.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment.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\riptxach.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\riptxach.exe"
C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
Network
Files
memory/672-55-0x0000000000220000-0x0000000000226000-memory.dmp
memory/672-56-0x0000000000220000-0x000000000022A000-memory.dmp
memory/672-57-0x0000000076A21000-0x0000000076A23000-memory.dmp
memory/552-58-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\riptxach.exe
| MD5 | ea8ff94f74983ea0fe9f96f4df50850b |
| SHA1 | f1bd1b5edae636b45833d3c080a65c7cf3b47ed6 |
| SHA256 | 991e72f2d6213d5841b0286574c5d0a387c662c9912faf477183768538754e4b |
| SHA512 | 6df7184111dcdf812bc44e006eafd232946014678c3d24742fe10742dfe97ce08548d0dca71f4b28265abf7e248cb0435e108f787fa73f98222f419d2acc6177 |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\riptxach.exe
| MD5 | ea8ff94f74983ea0fe9f96f4df50850b |
| SHA1 | f1bd1b5edae636b45833d3c080a65c7cf3b47ed6 |
| SHA256 | 991e72f2d6213d5841b0286574c5d0a387c662c9912faf477183768538754e4b |
| SHA512 | 6df7184111dcdf812bc44e006eafd232946014678c3d24742fe10742dfe97ce08548d0dca71f4b28265abf7e248cb0435e108f787fa73f98222f419d2acc6177 |
memory/1004-62-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\riptxach.exe
| MD5 | ea8ff94f74983ea0fe9f96f4df50850b |
| SHA1 | f1bd1b5edae636b45833d3c080a65c7cf3b47ed6 |
| SHA256 | 991e72f2d6213d5841b0286574c5d0a387c662c9912faf477183768538754e4b |
| SHA512 | 6df7184111dcdf812bc44e006eafd232946014678c3d24742fe10742dfe97ce08548d0dca71f4b28265abf7e248cb0435e108f787fa73f98222f419d2acc6177 |
memory/552-68-0x0000000000680000-0x0000000000682000-memory.dmp
memory/1604-69-0x0000000000120000-0x0000000000122000-memory.dmp
memory/1604-70-0x0000000000240000-0x0000000000241000-memory.dmp
memory/1004-71-0x0000000003F41000-0x0000000004DED000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\riptxach.exe
| MD5 | ea8ff94f74983ea0fe9f96f4df50850b |
| SHA1 | f1bd1b5edae636b45833d3c080a65c7cf3b47ed6 |
| SHA256 | 991e72f2d6213d5841b0286574c5d0a387c662c9912faf477183768538754e4b |
| SHA512 | 6df7184111dcdf812bc44e006eafd232946014678c3d24742fe10742dfe97ce08548d0dca71f4b28265abf7e248cb0435e108f787fa73f98222f419d2acc6177 |
Analysis: behavioral2
Detonation Overview
Submitted
2021-12-01 09:17
Reported
2021-12-01 09:19
Platform
win10-en-20211014
Max time kernel
142s
Max time network
128s
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\vbgofoch.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vbgofoch.exe | C:\Users\Admin\AppData\Local\Temp\Tax Payment.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vbgofoch.exe | C:\Users\Admin\AppData\Local\Temp\Tax Payment.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-1-5-21-941723256-3451054534-3089625102-1000_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.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment.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 |
| 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\vbgofoch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vbgofoch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vbgofoch.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Tax Payment.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment.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\vbgofoch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vbgofoch.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 |
Files
memory/3028-118-0x00000000001E0000-0x00000000001E6000-memory.dmp
memory/3028-119-0x00000000001E0000-0x00000000001EA000-memory.dmp
memory/2908-120-0x0000000000000000-mapping.dmp
memory/2316-121-0x0000000000000000-mapping.dmp
memory/1280-122-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vbgofoch.exe
| MD5 | ea8ff94f74983ea0fe9f96f4df50850b |
| SHA1 | f1bd1b5edae636b45833d3c080a65c7cf3b47ed6 |
| SHA256 | 991e72f2d6213d5841b0286574c5d0a387c662c9912faf477183768538754e4b |
| SHA512 | 6df7184111dcdf812bc44e006eafd232946014678c3d24742fe10742dfe97ce08548d0dca71f4b28265abf7e248cb0435e108f787fa73f98222f419d2acc6177 |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vbgofoch.exe
| MD5 | ea8ff94f74983ea0fe9f96f4df50850b |
| SHA1 | f1bd1b5edae636b45833d3c080a65c7cf3b47ed6 |
| SHA256 | 991e72f2d6213d5841b0286574c5d0a387c662c9912faf477183768538754e4b |
| SHA512 | 6df7184111dcdf812bc44e006eafd232946014678c3d24742fe10742dfe97ce08548d0dca71f4b28265abf7e248cb0435e108f787fa73f98222f419d2acc6177 |
memory/1280-125-0x00000000004C0000-0x00000000004C6000-memory.dmp
memory/1280-126-0x00000000004C0000-0x00000000004CA000-memory.dmp