Help... I've been hacked!

[Janicki at ia-inc.com (Chris Janicki)]

Hi, I'm brand new to Linux, although I know Solaris.  I was working on my 
brand new Red Hat 6.2 Linux machine (soon to be my web server, email 
server, etc.) when I noticed an email returned to root.  It was from 
Yahoo, saying that the destination's email box was full.  The subject of 
the email was my IP address! Knowing that I hadn't sent any email, I did 
'grep yahoo /bin/*' and found that email address in login, ps, ls, and 
netstat.  I've been hacked, right?!

1) What can I do to replace those files?  I spent many hours configuring 
box, so I don't want to start from scratch.

2) Is there anywhere else I should look for problems?

3) Is there any particular hole in RedHat 6.2 that I need to address.  
(It was preconfigured on the machine I bought from Penguin, in December.)

Thanks!

--
Chris Janicki
781-662-9424
Industrious Activities, Inc.
http://www.ia-inc.com

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