Virus Prevalence - November 2003

Virus NamePrevalencePercentageInstances
W32/Opaserv27.62% 7492
W32/Mimail25.99% 7050
W32/Dumaru7.95% 2156
W32/Sobig5.65% 1534
W32/Bugbear5.3% 1437
W32/Sober4.09% 1110
W95/Dupator4.09% 1109
W32/Swen3.74% 1014
W32/Gibe3.65% 989
W32/Klez2.99% 812
W32/Yaha2.79% 756
W32/Funlove1.05% 286
W95/Spaces0.7% 190
W32/Nachi0.62% 167
W32/Fizzer0.36% 99
W32/Magistr0.32% 87
VBS/Redlof0.27% 73
W32/Lovsan0.27% 73
W32/SirCam0.22% 59
W32/Holar0.16% 43
W32/Deborm0.15% 40
W32/Spybot0.11% 30
W32/Nimda0.11% 31
W32/Ganda0.11% 29
W32/Kriz0.09% 24
W32/Lovgate0.09% 24
W32/Sdbot0.09% 25
W32/Hybris0.09% 25
JS/Fortnight0.09% 24
W32/Parite0.08% 22
W32/BadTrans0.07% 20
W95/Lorez0.07% 20
W32/Valla0.07% 20
W32/BleBla0.07% 19
W95/CIH0.07% 18
W32/Elkern0.06% 15
XM/Laroux0.06% 15
W32/Gaobot0.06% 16
W32/Sluter0.05% 14
Mumu0.04% 10
Flea0.04% 10
VBS/Psyme0.04% 12
W32/Lirva0.03% 8
Cascade0.03% 7
W32/Torvil0.03% 9
W32/Cabanas0.02% 5
W95/Tenrobot0.02% 6
W95/Whog0.02% 5
W32/Randon0.01% 3
Netlog0.01% 3
VBS/LoveLetter0.01% 4
CMOS0.01% 2
Parity Boot0.01% 2
W32/Marque0.01% 4
W97M/Marker0.01% 3
W32/Mofei0.01% 2
W32/Lovelorn0.01% 2
W32/Slanper0.01% 2
W32/Hawawi0.01% 2
WelcomB0.01% 2
W97M/Thus0.01% 3
W95/Bumble0.01% 3
W95/Ilmx0.01% 3
W32/Winur0.01% 2
Sic0.01% 3
W32/Antinny0.01% 3
W32/Ronoper0.01% 3
W32/Pate0.01% 2
Proverb0% 1
W97M/Ethan0% 1
W32/Jeefo0% 1
W32/Blaxe0% 1
Form0% 1
W32/Mapson0% 1
AntiEXE0% 1
W95/Lovesong0% 1
Solaris/Sadmind0% 1
Linux/Slapper0% 1
W32/Bymer0% 1
Junkie0% 1
Melissa0% 1
IEStart0% 1
W32/Vote0% 1
WYX0% 1
W32/Hantaner0% 1
JS/Kak0% 1
W32/Nofear0% 1
W32/Ultimax0% 1
W32/MTX0% 1
W32/Acebot0% 1
W32/Inor0% 1
Cap0% 1
W32/Cult0% 1
W32/Raleka0% 1
ColdApe0% 1
W32/Chir0% 1
W95/Kuang0% 1
VCX0% 1
Freelinks0% 1
W32/IRCBounce0% 1

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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