Analysis Overview
SHA256
59f20bfe00956a55cfdf0403942b51d5ee17207eac28e9ea6ea6c6a5840b1ec0
Threat Level: Known bad
The file 59f20bfe00956a55cfdf0403942b51d5ee17207eac28e9ea6ea6c6a5840b1ec0 was found to be: Known bad.
Malicious Activity Summary
Kutaki Executable
Kutaki family
Kutaki
Executes dropped EXE
Loads dropped DLL
Drops startup file
Maps connected drives based on registry
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Modifies Internet Explorer settings
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-07-24 02:20
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2022-07-24 02:20
Reported
2022-07-25 10:57
Platform
win7-20220715-en
Max time kernel
150s
Max time network
49s
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\hyuder.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | 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\hyuder.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\hyuder.exe | N/A |
Enumerates physical storage devices
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Main | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe
"C:\Users\Admin\AppData\Local\Temp\TDS Challan.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\hyuder.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe"
Network
Files
memory/1820-56-0x0000000076C01000-0x0000000076C03000-memory.dmp
memory/1792-57-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 2600b7e78f3a1d996294bcc27b309594 |
| SHA1 | a90f63310dca46b419cfcbe95d90e1517932d6d3 |
| SHA256 | 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58 |
| SHA512 | db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 2600b7e78f3a1d996294bcc27b309594 |
| SHA1 | a90f63310dca46b419cfcbe95d90e1517932d6d3 |
| SHA256 | 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58 |
| SHA512 | db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 2600b7e78f3a1d996294bcc27b309594 |
| SHA1 | a90f63310dca46b419cfcbe95d90e1517932d6d3 |
| SHA256 | 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58 |
| SHA512 | db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b |
memory/2016-60-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 2600b7e78f3a1d996294bcc27b309594 |
| SHA1 | a90f63310dca46b419cfcbe95d90e1517932d6d3 |
| SHA256 | 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58 |
| SHA512 | db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b |
Analysis: behavioral2
Detonation Overview
Submitted
2022-07-24 02:20
Reported
2022-07-25 10:57
Platform
win10v2004-20220722-en
Max time kernel
152s
Max time network
127s
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\hyuder.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | 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\hyuder.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\hyuder.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\TDS Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 5064 wrote to memory of 4788 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 5064 wrote to memory of 4788 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 5064 wrote to memory of 4788 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 5064 wrote to memory of 916 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe |
| PID 5064 wrote to memory of 916 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe |
| PID 5064 wrote to memory of 916 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe
"C:\Users\Admin\AppData\Local\Temp\TDS Challan.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\hyuder.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe"
Network
| Country | Destination | Domain | Proto |
| US | 13.107.4.50:80 | tcp |
Files
memory/4788-134-0x0000000000000000-mapping.dmp
memory/916-135-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 2600b7e78f3a1d996294bcc27b309594 |
| SHA1 | a90f63310dca46b419cfcbe95d90e1517932d6d3 |
| SHA256 | 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58 |
| SHA512 | db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
| MD5 | 2600b7e78f3a1d996294bcc27b309594 |
| SHA1 | a90f63310dca46b419cfcbe95d90e1517932d6d3 |
| SHA256 | 8b12a088323095e7307e40be4b3194cebd6756d9414d360e06e2015804ad6b58 |
| SHA512 | db6926d1cf359712dd7c77b48444f00d0f8ea776cdec752d604a68a3037eadbd38723f50ee655821eda51d21a528c00313e505575816c2ad659856fad886da7b |