Virus Prevalence - December 2003

Virus NamePrevalencePercentageInstances
W32/Opaserv29.4% 5376
W32/Mimail19.72% 3606
W32/Dumaru16.08% 2940
W32/Swen8.84% 1616
W95/Dupator4.18% 764
W32/Bugbear3.88% 709
W32/Klez2.96% 541
W32/Sober2.6% 475
W32/Yaha2.6% 476
W32/Gibe2.17% 397
W32/Sobig2.09% 382
W32/Frethem0.99% 181
W32/SirCam0.62% 114
W95/Spaces0.45% 83
W32/Deborm0.32% 59
W32/Nachi0.3% 54
W32/Spybot0.25% 46
W32/Magistr0.24% 44
W32/Fizzer0.18% 33
W32/Torvil0.18% 33
W32/Lovsan0.18% 33
W32/Pate0.13% 24
W32/Kriz0.11% 21
W95/Lorez0.11% 20
WelcomB0.11% 21
W32/Gaobot0.11% 21
W32/Holar0.09% 17
W32/Valla0.09% 17
W32/Parite0.09% 17
W32/Funlove0.08% 15
VBS/Redlof0.07% 12
W32/Randex0.07% 12
W32/Ganda0.05% 10
W32/Hybris0.05% 10
W32/Lovgate0.04% 7
JS/Fortnight0.04% 7
W32/Gluber0.03% 6
W32/Cabanas0.03% 6
Flea0.03% 6
W32/Lovelorn0.03% 6
W95/Whog0.03% 5
W32/Sdbot0.03% 6
Class0.02% 3
W32/Psyme0.02% 3
IEStart0.02% 4
Inor0.02% 3
JS/Kak0.02% 4
W95/Ilmx0.02% 4
W32/Ronoper0.02% 3
W97M/Ethan0.01% 2
W32/BadTrans0.01% 1
W32/Randon0.01% 2
W32/Jeefo0.01% 2
W95/Beast0.01% 1
W32/Elkern0.01% 1
Form0.01% 1
Blee0.01% 1
Mumu0.01% 1
Tiny0.01% 1
Parity Boot0.01% 1
W32/Alphx0.01% 1
W32/Reur0.01% 1
W97M/Marker0.01% 1
W32/Nimda0.01% 1
W32/Aplore0.01% 1
WYX0.01% 2
Stoned0.01% 1
W32/Hantaner0.01% 1
W32/Graps0.01% 1
W95/Tenrobot0.01% 2
W32/QAZ0.01% 1
Funny0.01% 1
W32/Scold0.01% 1
W97M/Thus0.01% 2
W32/Raleka0.01% 1
W95/Kuang0.01% 1
W32/Epon0.01% 1
W95/CIH0.01% 1
VBS/Haptime0.01% 2
W95/Bodgy0.01% 1
Digital0.01% 1
AntiCMOS0.01% 1
Wrench0.01% 2
W32/Navidad0.01% 1
W32/Sluter0.01% 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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