Virus Prevalence - April 2005

Virus NamePrevalencePercentageInstances
W32/Netsky66.95% 30208
W32/Bagle10.12% 4567
W32/Bagz7.85% 3542
W32/Mydoom5.43% 2448
W32/Mytob1.43% 647
W32/Funlove0.87% 393
W32/Zafi0.82% 370
W32/Klez0.8% 359
W32/Mabutu0.67% 304
W32/Dumaru0.62% 279
W32/Lovgate0.61% 273
W32/Bugbear0.38% 170
W32/MyWife0.37% 167
W32/Pate0.33% 150
W32/Valla0.27% 122
W32/Swen0.26% 119
W32/Sober0.24% 108
W32/Mimail0.24% 107
W32/Mota0.17% 75
VBS/Redlof0.17% 76
W32/Fizzer0.12% 52
W32/Yaha0.11% 51
W32/Sobig0.09% 41
W95/Tenrobot0.06% 27
W32/Lovelorn0.06% 25
W32/Hybris0.06% 28
W32/Maslan0.06% 26
W32/Tenga0.06% 8573
W32/Kriz0.05% 22
W32/Nachi0.05% 21
W32/BadTrans0.04% 18
W32/Elkern0.04% 19
W32/Magistr0.04% 19
W95/Dupator0.04% 16
XM/Laroux0.04% 16
W32/Randex0.04% 17
W95/Spaces0.04% 18
W32/Nimda0.03% 12
W32/Myfip0.03% 12
W32/Plexus0.03% 12
VBS/LoveLetter0.02% 8
Mumu0.02% 7
W32/Ganda0.02% 11
W95/CIH0.02% 8
W32/Gaobot0.02% 9
VBS/Psyme0.02% 10
JS/Fortnight0.02% 7
W32/Antinny0.02% 7
AntiCMOS0.02% 11
W32/Tecata0.02% 9
W97M/Ethan0.01% 3
Class0.01% 3
W32/Wukill0.01% 5
VBS/Soraci0.01% 3
W32/Traxg0.01% 4
W32/Korgo0.01% 6
Cap0.01% 4
Hiac0.01% 3
W32/Sdbot0.01% 3
W32/Buchon0.01% 4
W32/Lovsan0.01% 4
W32/Sasser0.01% 6
Sic0.01% 4
Win32/Bube0.01% 5

Background

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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