Please search for your problem before posting! I’ve solved plenty of similar posts!
Answering your question:
Yes, this is in fact a virus/backdoor. This one in specific takes away your robux if you accept, but no worries as the original owner and group are banned. Oh, and in order to remove the virus, use this plugin to remove scripts or malicious scripts, make sure to delete suspicious plugins, and please be cautious when downloading them! Thanks for reading, hope this helped. Have an amazing rest of your day/night!