The hash-attack on monero was never real as far as I know. It was just a bug. Some pool figured out a way to fake its hash-rate that's all. Looks like some exchanges got fooled by it.
You concluded it was a bug but the Monero team knows better. It felt the grief of panic and anger while all that was going on. The dude behind Qubic, (Twitter handle – Come-from-Beyond @c__f__b), said what he wanted to do with Monero before embarking on it. So, it wasn't as if it wasn't planned ahead. CFB actually didn't mean to destroy Monero but to prove to the community what just played out. The Monero team would've lost it if it was an attack from the various writeups, the back and forth, that I read. Monero just got rattled. The same dude is now contemplating another challenge on Dogecoin.
I made a post on this similar issue a few days ago here.