Analysis Overview
SHA256
e0120e7987cf2d3cbccd0b18f2857c76f948e4cf42f48cdb1a2f78514627b6d6
Threat Level: Known bad
The file 05404a627f0b50208eccd94c35609f16 was found to be: Known bad.
Malicious Activity Summary
Kutaki
Kutaki Executable
Kutaki family
Executes dropped EXE
Loads dropped DLL
Drops startup file
Drops file in Windows directory
Enumerates physical storage devices
Modifies Internet Explorer settings
Suspicious use of WriteProcessMemory
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Modifies registry class
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-12-01 06:25
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 06:25
Reported
2021-12-01 06:27
Platform
win7-en-20211104
Max time kernel
122s
Max time network
122s
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\gnbudsch.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gnbudsch.exe | C:\Users\Admin\AppData\Local\Temp\Tax Pyament Challan.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gnbudsch.exe | C:\Users\Admin\AppData\Local\Temp\Tax Pyament Challan.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Pyament Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Pyament Challan.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\gnbudsch.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 Pyament Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Pyament Challan.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\gnbudsch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gnbudsch.exe"
C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
Network
Files
memory/1136-55-0x0000000000220000-0x0000000000226000-memory.dmp
memory/1136-56-0x0000000000220000-0x000000000022A000-memory.dmp
memory/1136-57-0x0000000075981000-0x0000000075983000-memory.dmp
memory/824-58-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gnbudsch.exe
| MD5 | bcd53d5e0cf0449701730264d03659cc |
| SHA1 | 3f8e7e422106b9e3a8b0569c8f879c52a5196bde |
| SHA256 | 2da69ffa0187b1b7155fe5083fea59857159ba31aa3757e7f26df834770119a4 |
| SHA512 | 4ad0adc78bcf6556298455a125f6c61d0d6175bd1f9297d6dd50b4dbedfc89dc51e0ecfa220b96b4150859259e428a763bc71369b809afda4587670f41e78ada |
memory/1160-62-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gnbudsch.exe
| MD5 | bcd53d5e0cf0449701730264d03659cc |
| SHA1 | 3f8e7e422106b9e3a8b0569c8f879c52a5196bde |
| SHA256 | 2da69ffa0187b1b7155fe5083fea59857159ba31aa3757e7f26df834770119a4 |
| SHA512 | 4ad0adc78bcf6556298455a125f6c61d0d6175bd1f9297d6dd50b4dbedfc89dc51e0ecfa220b96b4150859259e428a763bc71369b809afda4587670f41e78ada |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gnbudsch.exe
| MD5 | bcd53d5e0cf0449701730264d03659cc |
| SHA1 | 3f8e7e422106b9e3a8b0569c8f879c52a5196bde |
| SHA256 | 2da69ffa0187b1b7155fe5083fea59857159ba31aa3757e7f26df834770119a4 |
| SHA512 | 4ad0adc78bcf6556298455a125f6c61d0d6175bd1f9297d6dd50b4dbedfc89dc51e0ecfa220b96b4150859259e428a763bc71369b809afda4587670f41e78ada |
memory/1160-65-0x00000000003B0000-0x00000000003BA000-memory.dmp
memory/1160-64-0x00000000003B0000-0x00000000003B6000-memory.dmp
memory/824-68-0x0000000001FD0000-0x0000000001FD2000-memory.dmp
memory/1284-69-0x0000000000220000-0x0000000000222000-memory.dmp
memory/1284-70-0x0000000000410000-0x0000000000411000-memory.dmp
memory/1160-72-0x0000000003E31000-0x0000000004CDD000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gnbudsch.exe
| MD5 | bcd53d5e0cf0449701730264d03659cc |
| SHA1 | 3f8e7e422106b9e3a8b0569c8f879c52a5196bde |
| SHA256 | 2da69ffa0187b1b7155fe5083fea59857159ba31aa3757e7f26df834770119a4 |
| SHA512 | 4ad0adc78bcf6556298455a125f6c61d0d6175bd1f9297d6dd50b4dbedfc89dc51e0ecfa220b96b4150859259e428a763bc71369b809afda4587670f41e78ada |
Analysis: behavioral2
Detonation Overview
Submitted
2021-12-01 06:25
Reported
2021-12-01 06:27
Platform
win10-en-20211104
Max time kernel
126s
Max time network
122s
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\dupdojch.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\dupdojch.exe | C:\Users\Admin\AppData\Local\Temp\Tax Pyament Challan.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dupdojch.exe | C:\Users\Admin\AppData\Local\Temp\Tax Pyament Challan.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-1-5-21-1042495040-510797905-2613508344-1000_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 Pyament Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Pyament Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Pyament Challan.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\dupdojch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dupdojch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dupdojch.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 Pyament Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Pyament Challan.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\dupdojch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dupdojch.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/3340-120-0x0000000000000000-mapping.dmp
memory/1104-121-0x0000000000000000-mapping.dmp
memory/2808-122-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dupdojch.exe
| MD5 | bcd53d5e0cf0449701730264d03659cc |
| SHA1 | 3f8e7e422106b9e3a8b0569c8f879c52a5196bde |
| SHA256 | 2da69ffa0187b1b7155fe5083fea59857159ba31aa3757e7f26df834770119a4 |
| SHA512 | 4ad0adc78bcf6556298455a125f6c61d0d6175bd1f9297d6dd50b4dbedfc89dc51e0ecfa220b96b4150859259e428a763bc71369b809afda4587670f41e78ada |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dupdojch.exe
| MD5 | bcd53d5e0cf0449701730264d03659cc |
| SHA1 | 3f8e7e422106b9e3a8b0569c8f879c52a5196bde |
| SHA256 | 2da69ffa0187b1b7155fe5083fea59857159ba31aa3757e7f26df834770119a4 |
| SHA512 | 4ad0adc78bcf6556298455a125f6c61d0d6175bd1f9297d6dd50b4dbedfc89dc51e0ecfa220b96b4150859259e428a763bc71369b809afda4587670f41e78ada |
memory/2808-125-0x00000000005A0000-0x00000000005A6000-memory.dmp
memory/2808-126-0x00000000005A0000-0x00000000005AA000-memory.dmp