Mark Ratledge on "My Wordpress infected with malware?"

David Borrink said: I restored that file to the normal code and that stopped any activity....

I doubt that very much. If you didn't carefully follow FAQ My site was hacked - WordPress Codex, there's a good chance you will get hacked again.

And take a look at the recommended security measures in Hardening WordPress - WordPress Codex and Brute Force Attacks - WordPress Codex