It's always worth a quick and dirty investigation of your machine with utilities what are already installed and may therefore have been compromised, but in order to carry out the investigations described in this document thoroughly you will need a set of utilities that you can trust not to omit or filter out information. Do both of the following:

1. Carry out at least the Minimum Immediate Network-Related Checks using a toolkit of CD-R-mounted statically-linked utilites. If possible carry out all checks listed in First Steps.
   
   
2. Carry out a full set of checks after booting from a live CD.