I don't know about "virustotal" web site, but if it's legit, you'd better report them false positives. I've scanned both files with Avast and AVG and no viruses were detected. Both https://afterwarp.io and https://asphyre.net are owned by the same guy - Yuriy Kotsarenko, he presented the framework recently on DelphiDay: https://www.delphiday.it/conferenza. He previously worked at Embarcadero.