Analysis Overview
SHA256
9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
Threat Level: Known bad
The file IncomeTax_Payment_Receipt.exe was found to be: Known bad.
Malicious Activity Summary
Kutaki family
Kutaki Executable
Kutaki
Executes dropped EXE
Drops startup file
Loads dropped DLL
Program crash
Suspicious use of WriteProcessMemory
Modifies Internet Explorer settings
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2022-07-03 21:21
Signatures
Kutaki Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kutaki family
Analysis: behavioral1
Detonation Overview
Submitted
2022-07-03 21:21
Reported
2022-07-03 21:23
Platform
win7-20220414-en
Max time kernel
119s
Max time network
46s
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 |
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| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
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Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe |
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe | N/A |
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe
"C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.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\zbzljvch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2028 -s 1212
Network
Files
memory/1260-56-0x0000000075361000-0x0000000075363000-memory.dmp
memory/2024-57-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |
memory/2028-60-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |
memory/2028-65-0x0000000004021000-0x0000000004ECD000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |
memory/1580-67-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zbzljvch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |
Analysis: behavioral2
Detonation Overview
Submitted
2022-07-03 21:21
Reported
2022-07-03 21:23
Platform
win10v2004-20220414-en
Max time kernel
145s
Max time network
156s
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\nbmonxch.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\nbmonxch.exe | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3060 wrote to memory of 464 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3060 wrote to memory of 464 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3060 wrote to memory of 464 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3060 wrote to memory of 4628 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe |
| PID 3060 wrote to memory of 4628 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe |
| PID 3060 wrote to memory of 4628 | N/A | C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe
"C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.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\nbmonxch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe"
Network
| Country | Destination | Domain | Proto |
| NL | 20.190.160.136:443 | tcp | |
| US | 93.184.220.29:80 | tcp | |
| NL | 20.190.160.69:443 | tcp | |
| US | 20.189.173.4:443 | tcp | |
| NL | 20.190.160.6:443 | tcp | |
| NL | 104.110.191.133:80 | tcp | |
| NL | 104.123.41.162:80 | tcp | |
| NL | 20.190.160.2:443 | tcp | |
| NL | 20.190.160.4:443 | tcp | |
| NL | 20.190.160.71:443 | tcp |
Files
memory/464-132-0x0000000000000000-mapping.dmp
memory/4628-133-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe
| MD5 | bc6618a7be87946f55d90ac92b47f0bc |
| SHA1 | 10da65cd3ba38618f83473ab6c09abaec80e8341 |
| SHA256 | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307 |
| SHA512 | d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f |