I just found out that I may have been hacked/attacked
is it possible for someone to destroy my system bios from a remote system ?
Sorry but that is not currently possible yet, hackers target destroying the windows/linux/mac system environment.
Most notable damage you'll take is hard drives/ssd loosing information or dying after the chaos is over with.
Like carnage I also want to know where you found out you've been attacked online.
Isn't your system suppose to be down ?
No way possible you could have found that out.
Not unless the machine is operational and you have direct proof of error messages from av/firewall if you have them.