Can't login to dashboard

That might be related to your hosting company – see:

https://www.ads-software.com/support/topic/brute-force-attacks-and-wordpress?replies=2

OR provide more details. Also please do not use all caps on these forums – it’s considered yelling.

Is there a patch for the ddos attack?

Not as such, no – as these are server related. However I’d suggest reviewing https://www.ads-software.com/support/topic/brute-force-attacks-and-wordpress and Brute Force Attacks.