• W32.Bugbear.A aka Tanatos: a mass-mailing worm. Can be spread through network shares. Has keystroke-logging and backdoor capabilities. Will attempt to terminate the processes of AV and firewall programs.
  Check out the Latest Worms (MS) page.

F-Secure
McAfee
Symantec
Trend Micro

• Linux.Slapper.Worm aka Slapper: a family of worms that use an OpenSSL buffer overflow
  exploit to run a shell on a remote computer. Each variant targets vulnerable installations of the Apache Web server on Linux operating systems, including versions of SuSe, Mandrake, RedHat, Slackware, and Debian. Code for a Distributed Denial of Service attack is included.
  Check out the Latest Worms (Linux) page.

F-Secure
McAfee
Symantec
Trend Micro