October Evil Top Ten is naught but a collection of midgets and have-beens. Msblast.A is still on top of our top, running strong with twice the number of infected machines it had chalked up last month, but the rest of it is just as peaceful as we like it .
| Ranking | Virus Name | Percentage |
| 1. | Win32.Msblast.A | 34.2% |
| 2. | Win32.BugBear.B@mm | 12.5% |
| 3. | Win32.Swen.A@mm | 10% |
| 4. | Win32.Parite.B | 8.2% |
| 5. | Win32.HLLP.Hanta.A | 7.0% |
| 6. | Win32.HLLW.Agobot.G | 7.1% |
| 7. | Win32.Worm.Welchia.A | 6.3% |
| 8. | Win32.P2P.Tanked.B | 5.2% |
| 9. | JS.Trojan.NoClose.K | 4.8% |
| 10. | Win32.Klez.H@mm | 4.7% |
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