Sounds about right, the majority of antivirus software just interpret any "unknown" exe file as a virus, I'm gonna test it and see for myself. --> Edit: Its not a virus
I've downloaded multiple exe files from this and other gamejams without ever getting a warning about a virus. This is the first one I've seen cancel my download and just say NO. Also, this is a RAR file, not an EXE. I had to extract SEM.rar earlier today and it downloaded without any issues.
Weird, i sent my godot game that i made for this jam to my friends and one of them had the same issue, but after turning windows defender off managed to run my game. My game is an .exe but i sent as a RAR file too.