Online Security, a global provider of computer forensics and information technology risk mitigation since 1997   Original Source:    http://www.sophos.com/virusinfo/topten/ Top 10 Viruses for September 2001 Author:  Sophos Anti Virus 1. W32/Sircam-A 21.7% 2. W32/Nimda-A 17.8% 3. W32/Magistr-B 16.1% 4. W32/Magistr-A 09.2% 5. W32/Hy is-B 06.6% 6. VBS/Kakworm 02.5% 7. UNIX/Sadmind 01.9% 8. W32/Apology-B 01.3% 9. W/32Verona-B 01.2% 10. VBS/Haptime-A 01.0%