The downloadable file is original. It has not been modified in any way.
File: comstresstest.exe Size: 1.8 MB MD5: cc3623f87689d3a99eab333c143fa3e9 Last checked: May 24, 2023.
It's used for controlling and debugging binary and other difficult data streams.
Tool for emulating a com port or an Ethernet device.
Advanced USB Port Monitor will allow you to display the packets sent.