Look in SuSE's package manager. There is a package that supplies a security document "opensuse-security_en.pdf". There is also a "seccheck" package that runs security checks on your system and emails the results. It may already be installed and running, and you just need to receive root's email to read the reports. It performs daily, weekly and monthly check, and will notify you of potential problems such as world readable files or packages that don't validate. This helps with prevention.
While there are very few native linux "viruses", a linux virus scanner may also check for configuration errors that could be exploited. If you run a server, this is one more tool to use.
Also look at the chkrootkit package.