Need help to identify an unrecognized folder (exploid) and file (target) on linux server

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Project Budget (USD)
$30 - $250

Project Description:
I just went into my server via FTP and found unrecognized folders named "exploit" containing a file named "target".

This folder and file is in every folder from my website. The user owner is "root" and chmod 711.

I have a dedicated server using red hat 5 Linux and I have root access.

I need help telling me ehat is it?
How can I delete it from my server?
See if anything else has been installed?
And see how did it get there?

Additional Project Description:
12/08/2012 at 2:53 EST
Grammar correction:
I need help telling me what is it?

Also, I need some security counseling

Skills required:
Hire rcapi
Project posted by:
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