| Virus Name | Prevalence | Percentage | Instances |
|---|---|---|---|
| W32/Klez |   | 42.07% | 3179 |
| W32/Opaserv | | 26.61% | 2011 |
| W95/Dupator | | 5.02% | 379 |
| W32/Bugbear | | 3.4% | 257 |
| W32/Gibe | | 3.22% | 243 |
| W32/Funlove | | 2.75% | 208 |
| W32/Yaha | | 2.66% | 201 |
| W32/Magistr | | 2.2% | 166 |
| W32/Sobig | | 1.98% | 150 |
| W32/Lirva | | 1.8% | 136 |
| W32/Nimda | | 1.31% | 99 |
| VBS/Redlof | | 1.19% | 90 |
| W32/SirCam | | 0.67% | 51 |
| W32/Hybris | | 0.54% | 41 |
| W32/BadTrans | | 0.48% | 36 |
| XM/Laroux | | 0.48% | 36 |
| W95/CIH | | 0.42% | 32 |
| W32/Lovgate | | 0.34% | 26 |
| W95/Lorez | | 0.2% | 15 |
| W32/Elkern | | 0.16% | 12 |
| W97M/Marker | | 0.13% | 10 |
| JS/Kak | | 0.13% | 10 |
| W32/Ganda | | 0.13% | 10 |
| W32/Kriz | | 0.09% | 7 |
| W32/Parite | | 0.09% | 7 |
| W32/Deloder | | 0.09% | 7 |
| W95/Spaces | | 0.09% | 7 |
| W32/Aliz | | 0.08% | 6 |
| W95/Whog | | 0.08% | 6 |
| W32/MTX | | 0.07% | 5 |
| W32/Frethem | | 0.07% | 5 |
| Tristate | | 0.07% | 5 |
| W97M/Ethan | | 0.05% | 4 |
| VBS/LoveLetter | | 0.05% | 4 |
| W32/Hantaner | | 0.05% | 4 |
| W32/Oror | | 0.05% | 4 |
| VBS/Haptime | | 0.05% | 4 |
| W32/Braid | | 0.04% | 3 |
| Cap | | 0.04% | 3 |
| Divi | | 0.04% | 3 |
| W32/Datom | | 0.04% | 3 |
| JS/Fortnight | | 0.04% | 3 |
| Class | | 0.03% | 2 |
| W32/Duni | | 0.03% | 2 |
| Form | | 0.03% | 2 |
| WYX | | 0.03% | 2 |
| Eight941 | | 0.03% | 2 |
| W32/Higuy | | 0.03% | 2 |
| W32/Ska | | 0.03% | 2 |
| W32/Marburg | | 0.03% | 2 |
| W32/IRCBounce | | 0.03% | 2 |
| W32/FBound | | 0.03% | 2 |
| W32/CodeRed | | 0.03% | 2 |
| W32/Debom | | 0.03% | 2 |
| AntiCMOS | | 0.03% | 2 |
| W32/Tecata | | 0.03% | 2 |
| Titch | | 0.01% | 1 |
| Aro | | 0.01% | 1 |
| Mac/nVIR | | 0.01% | 1 |
| W32/Winevar | | 0.01% | 1 |
| Dope | | 0.01% | 1 |
| Concept | | 0.01% | 1 |
| RDA-Fighter | | 0.01% | 1 |
| AntiEXE | | 0.01% | 1 |
| Solaris/Sadmind | | 0.01% | 1 |
| Linux/Slapper | | 0.01% | 1 |
| W32/Lanfilt | | 0.01% | 1 |
| Parity Boot | | 0.01% | 1 |
| AMSE | | 0.01% | 1 |
| Npad | | 0.01% | 1 |
| W32/Bibrog | | 0.01% | 1 |
| Moon | | 0.01% | 1 |
| W32/KWBot | | 0.01% | 1 |
| Van | | 0.01% | 1 |
| Groov | | 0.01% | 1 |
| IEStart | | 0.01% | 1 |
| W32/Hawawi | | 0.01% | 1 |
| Morx | | 0.01% | 1 |
| Interior | | 0.01% | 1 |
| W32/Cult | | 0.01% | 1 |
| W97M/Thus | | 0.01% | 1 |
| W95/Ilmx | | 0.01% | 1 |
| TPE | | 0.01% | 1 |
| Cartman | | 0.01% | 1 |
| Nsi | | 0.01% | 1 |
| Wazzu | | 0.01% | 1 |
| W95/Kuang | | 0.01% | 1 |
| W32/Loxar | | 0.01% | 1 |
| Opey | | 0.01% | 1 |
| VCX | | 0.01% | 1 |
| Myna | | 0.01% | 1 |
| Tequila | | 0.01% | 1 |
| Mac/Autostart9805 | | 0.01% | 1 |
| W32/Nicehello | | 0.01% | 1 |
| SQL/Slammer | | 0.01% | 1 |
| SQL/Spider | | 0.01% | 1 |
| Story | | 0.01% | 1 |
The Virus Bulletin prevalence table is compiled monthly from virus reports received by Virus Bulletin; both directly, and from other companies who pass on their statistics.
Reports are included only if they are confirmed, and hence, in conjunction with the WildList, the prevalence table provides a useful indication of the relative prevalence of various virus found in the wild at the time.
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