[Calash]

First thing to do is check all your files. Look for anything that should not be there. A common practice once a hacker gets access is to leave a shell script of some kind, so they can get back at any time.

What type of damage did they do? Was it just an alteration of some of the pages or was there deeper access, possible to the database.

I would suggest disabling all your mods and change all your passwords. Once some other replies come in on the security of the mods you can then determine if they are safe enough to reactivate.