From what I know from the dark side. Some malious hackers are coming very close to an new exploit for linux. They are testing it out everywhere. I would have to agree there is an worm on the server. I don’t know your arrangement of things are, but get some sleep I don’t think this person has access to your DB.
There has been an upsurge in attacks on servers lately. I wish I could help more I hate seeing this shit happen.greek39