Analysis Overview
SHA256
5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41
Threat Level: Known bad
The file Tax Payment Challan.exe was found to be: Known bad.
Malicious Activity Summary
Kutaki Executable
Kutaki
Kutaki family
Executes dropped EXE
Drops startup file
Loads dropped DLL
Drops file in Windows directory
Enumerates physical storage devices
Modifies Internet Explorer settings
Suspicious use of FindShellTrayWindow
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-11-19 12:57
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2021-11-19 12:57
Reported
2021-11-19 12:59
Platform
win7-en-20211014
Max time kernel
150s
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\jmvuioch.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\jmvuioch.exe | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
Enumerates physical storage devices
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Internet Explorer\Main | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.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 Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment 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\jmvuioch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe"
C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
Network
Files
memory/1864-55-0x0000000000260000-0x0000000000266000-memory.dmp
memory/1864-56-0x0000000000260000-0x000000000026A000-memory.dmp
memory/1864-57-0x0000000075B71000-0x0000000075B73000-memory.dmp
memory/856-58-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe
| MD5 | cca90533c2283834f8d53977f1dfde3b |
| SHA1 | 579d3991a8b5f3a71d615cbd9d64832dd88db2e1 |
| SHA256 | 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41 |
| SHA512 | ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe
| MD5 | cca90533c2283834f8d53977f1dfde3b |
| SHA1 | 579d3991a8b5f3a71d615cbd9d64832dd88db2e1 |
| SHA256 | 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41 |
| SHA512 | ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc |
memory/1120-62-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe
| MD5 | cca90533c2283834f8d53977f1dfde3b |
| SHA1 | 579d3991a8b5f3a71d615cbd9d64832dd88db2e1 |
| SHA256 | 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41 |
| SHA512 | ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc |
memory/1120-64-0x0000000000220000-0x0000000000226000-memory.dmp
memory/1120-65-0x0000000000220000-0x000000000022A000-memory.dmp
memory/856-68-0x00000000020B0000-0x00000000020B2000-memory.dmp
memory/1428-69-0x0000000000120000-0x0000000000122000-memory.dmp
memory/1428-70-0x0000000000280000-0x0000000000281000-memory.dmp
memory/1120-71-0x0000000003FA1000-0x0000000004E4D000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jmvuioch.exe
| MD5 | cca90533c2283834f8d53977f1dfde3b |
| SHA1 | 579d3991a8b5f3a71d615cbd9d64832dd88db2e1 |
| SHA256 | 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41 |
| SHA512 | ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc |
Analysis: behavioral2
Detonation Overview
Submitted
2021-11-19 12:57
Reported
2021-11-19 12:59
Platform
win10-en-20211104
Max time kernel
124s
Max time network
121s
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\gegxwach.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gegxwach.exe | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gegxwach.exe | C:\Users\Admin\AppData\Local\Temp\Tax Payment 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 Payment Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Tax Payment 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:\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\gegxwach.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gegxwach.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gegxwach.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment 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\gegxwach.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gegxwach.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 |
| US | 8.8.8.8:53 | ts-crl.ws.symantec.com | udp |
| US | 72.21.91.29:80 | ts-crl.ws.symantec.com | tcp |
Files
memory/980-120-0x0000000000000000-mapping.dmp
memory/2540-121-0x0000000000000000-mapping.dmp
memory/1332-122-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gegxwach.exe
| MD5 | cca90533c2283834f8d53977f1dfde3b |
| SHA1 | 579d3991a8b5f3a71d615cbd9d64832dd88db2e1 |
| SHA256 | 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41 |
| SHA512 | ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gegxwach.exe
| MD5 | cca90533c2283834f8d53977f1dfde3b |
| SHA1 | 579d3991a8b5f3a71d615cbd9d64832dd88db2e1 |
| SHA256 | 5074bfb6b468b2cd5a31acd87144e6e4a94c6073e65f506bafdb71000c16fb41 |
| SHA512 | ad00919d2ba243c0d342e7073d4ec7e559670dd37cc6f3007046e06ef52b889bd6dbbe5e5a619d80756d8c3172eeb0dea265b08f3704e74e19b8c9d49253e4cc |