Analysis Overview
SHA256
3b998760d65dba0cf8820f4743bda79310dea60a0926460f613ee4d90fa0c720
Threat Level: Known bad
The file 3b998760d65dba0cf8820f4743bda79310dea60a0926460f613ee4d90fa0c720 was found to be: Known bad.
Malicious Activity Summary
Kutaki Executable
Kutaki family
Kutaki
Executes dropped EXE
Drops startup file
Loads dropped DLL
Maps connected drives based on registry
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-07-03 10:15
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 10:15
Reported
2022-07-03 10:58
Platform
win7-20220414-en
Max time kernel
125s
Max time network
52s
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\kwtrutch.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kwtrutch.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\kwtrutch.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 |
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
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\kwtrutch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kwtrutch.exe"
Network
Files
memory/632-56-0x0000000075391000-0x0000000075393000-memory.dmp
memory/992-57-0x0000000000000000-mapping.dmp
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kwtrutch.exe
| MD5 | 1ba628a1b76f3a2f4133f94c7c18f91c |
| SHA1 | 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac |
| SHA256 | 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0 |
| SHA512 | 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24 |
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kwtrutch.exe
| MD5 | 1ba628a1b76f3a2f4133f94c7c18f91c |
| SHA1 | 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac |
| SHA256 | 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0 |
| SHA512 | 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24 |
memory/1036-60-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kwtrutch.exe
| MD5 | 1ba628a1b76f3a2f4133f94c7c18f91c |
| SHA1 | 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac |
| SHA256 | 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0 |
| SHA512 | 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24 |
Analysis: behavioral2
Detonation Overview
Submitted
2022-07-03 10:15
Reported
2022-07-03 10:58
Platform
win10v2004-20220414-en
Max time kernel
151s
Max time network
134s
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\yrzvowch.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yrzvowch.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\yrzvowch.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\yrzvowch.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\yrzvowch.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\yrzvowch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yrzvowch.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yrzvowch.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1464 wrote to memory of 4836 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1464 wrote to memory of 4836 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1464 wrote to memory of 4836 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1464 wrote to memory of 4432 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yrzvowch.exe |
| PID 1464 wrote to memory of 4432 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yrzvowch.exe |
| PID 1464 wrote to memory of 4432 | N/A | C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yrzvowch.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\yrzvowch.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yrzvowch.exe"
Network
| Country | Destination | Domain | Proto |
| NL | 20.50.201.200:443 | tcp | |
| NL | 67.26.111.254:80 | tcp | |
| NL | 67.26.111.254:80 | tcp | |
| NL | 67.26.111.254:80 | tcp |
Files
memory/4836-132-0x0000000000000000-mapping.dmp
memory/4432-133-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yrzvowch.exe
| MD5 | 1ba628a1b76f3a2f4133f94c7c18f91c |
| SHA1 | 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac |
| SHA256 | 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0 |
| SHA512 | 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24 |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\yrzvowch.exe
| MD5 | 1ba628a1b76f3a2f4133f94c7c18f91c |
| SHA1 | 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac |
| SHA256 | 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0 |
| SHA512 | 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24 |