Re: Apache hacks (./atac, d0s.txt)

["a.list.address () gmail com" <a.list.address () gmail com>]

Looks like someone was trying to use your server as a DDoS zombie. 
What kind of Perl or PHP scripts are on your server?  Look in your
Apache access log for POST requests that may have uploaded one of
these files, or GET/POST requests that may have uploaded a URL to
download one of these files.  See if you can figure out how it got on
your server.