The downloadable file is original. It has not been modified in any way.
File: serial_ethernet_connector.exe Size: 4.7 MB MD5: 50c333b562a70234a822bca1b41cf5e2 Last checked: April 19, 2023.
Tool for testing a COM or RS232 port (device).
It makes serial data from virtual serial ports available on a TCP/IP network.
It looks like as real hardware serial ports for communications applications.