My site was hacked over the weekend. Per Hostingmatters tech support:
You have two directories under your account space that are full of script kiddie files:
[...]
They fact that they’re owned by user “nobody” means they were placed there via an exploit in a php application or plugin you’re using. You need to upgrade your blog software/other php applications, remove any plugins you’re not using and upgrade the rest. Also recommend changing passwords for all users on your blogs, or anything else that is a php application.
This is a good time to upgrade to the latest EE. I need to find out what version of EE I was running so as to upgrade, and since my site is down, I can’t log in to check. All my EE files are still accessible by FTP though. What EE file can I examine to determine what EE version I was running?