[olug] Security breach?

[jman at miwire.com]

   Jack <jdunn110 at cox.net> wrote .

I'm running MandrivaLinux x64 2011 (KDE4) updated behind a commercial Trendnet
router.

I notice I've begun receiving spam emails supposedly from people in my address
book (thunderbird).  When I run 'top' I don't find any obvious intruder
files.  Having received three of these now, all from different addresses and
people, I suspect my computer is compromised.

This prompted me to check my security settings.  Turns out I had left the
firewall down from my last full re-install a couple of weeks ago.  It's back up.

Any suggestions for ridding a Linux system of malware?

     Jack
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    Just to capture  tcpdump -vvv -i ethX -w filename