Here is the wikipedia article with more details.
I started reading Lord of the Rings for the first time, and the preface mentioned people writing ‘Frodo Lives’ in subway walls in New York, and when I searched for it I found this archive link of the virus.
I think the most interesting point historically is “This virus was spread without the aid of the Internet. It was ported between systems by floppy disks.”
A castrated virus isn’t actual preservation.