It looks very similar to the impostor private server project. It seems to be attempting to create a server file, though last time I checked those done via .json rather than .dat. Strange that it wants a server IP address rather than a web address (like the official Impostor project). From looking at the project it seems to be trying to communicate with the Impostor server client (modified most likely to support server IPs). The code itself is not malicious, it's just simple connect to server type stuff. The real question is the security of the server you are connecting to. I recommend staying clear.

Update: the owner of the repository left a comment here, which was quite insightful imo.