I think my favorite is the Samy Worm
https://samy.pl/myspace/ (https://samy.pl/myspace/)
https://wikipedia.org/wiki/List_of_security_hacking_incidents (https://wikipedia.org/wiki/List_of_security_hacking_incidents)
(https://images.weserv.nl/?url=www.pandasecurity.com%2Fen%2Fmediacenter%2Fsrc%2Fuploads%2F2019%2F07%2Fpandasecurity-How-do-hackers-pick-their-targets.jpg)
stuxnet!
https://en.wikipedia.org/wiki/Stuxnet (https://en.wikipedia.org/wiki/Stuxnet)