#2 Jun 08, 2015 07:21
@jasonmurphy maybe your site got hacked and somebody injects code in it. As far as I know, none of the mentioned files is part of the core of b2evolution, so you should delete them.
You forgot to mention what version are you currently running. However, please update your site to the latest stable version, you'll be safe again because you'll get rid of the infected files and any other that your host haven't detected yet.