Analysis Overview
SHA256
4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a
Threat Level: Known bad
The file Tax Payment Challan.exe was found to be: Known bad.
Malicious Activity Summary
Kutaki
Kutaki family
Kutaki Executable
Executes dropped EXE
Drops startup file
Loads dropped DLL
Checks computer location settings
Drops file in Windows directory
Enumerates physical storage devices
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
2022-07-22 04:53
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2022-07-22 04:53
Reported
2022-07-22 04:56
Platform
win7-20220718-en
Max time kernel
113s
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 Challan.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 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
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\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/1668-56-0x0000000075B61000-0x0000000075B63000-memory.dmp
memory/1240-57-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
| MD5 | d25f259e5943e02244d5a6fb3cc9b778 |
| SHA1 | ae4c93a5264acdf26a11cd9165f7382afceedb50 |
| SHA256 | 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a |
| SHA512 | 8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019 |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
| MD5 | d25f259e5943e02244d5a6fb3cc9b778 |
| SHA1 | ae4c93a5264acdf26a11cd9165f7382afceedb50 |
| SHA256 | 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a |
| SHA512 | 8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019 |
memory/1652-61-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
| MD5 | d25f259e5943e02244d5a6fb3cc9b778 |
| SHA1 | ae4c93a5264acdf26a11cd9165f7382afceedb50 |
| SHA256 | 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a |
| SHA512 | 8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019 |
memory/1652-66-0x00000000028D0000-0x000000000338A000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2022-07-22 04:53
Reported
2022-07-22 04:56
Platform
win10v2004-20220721-en
Max time kernel
125s
Max time network
61s
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-1-5-21-2372564722-193526734-2636556182-1000\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 Challan.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 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-1-5-21-2372564722-193526734-2636556182-1000_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:\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 |
| 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 |
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:\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\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
Network
| Country | Destination | Domain | Proto |
| FR | 2.18.109.224:443 | tcp | |
| US | 20.42.65.89:443 | tcp |
Files
memory/3428-132-0x0000000000000000-mapping.dmp
memory/376-133-0x0000000000000000-mapping.dmp
memory/4328-134-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
| MD5 | d25f259e5943e02244d5a6fb3cc9b778 |
| SHA1 | ae4c93a5264acdf26a11cd9165f7382afceedb50 |
| SHA256 | 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a |
| SHA512 | 8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019 |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
| MD5 | d25f259e5943e02244d5a6fb3cc9b778 |
| SHA1 | ae4c93a5264acdf26a11cd9165f7382afceedb50 |
| SHA256 | 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a |
| SHA512 | 8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019 |