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It has lost some ground, but Klez is still the most common source of virus reports.


The Klez-H variant accounted for 12.7 percent of all reported viruses in April, according to statistics compiled by Sophos, a provider of anti-virus software for businesses. In February, Klez-H accounted for 13.7 percent.


Klez has been riding the virus charts for more than a year and has become the most persistent worm ever. It was first discovered in late 2001 and has since resurfaced in modified disguises numerous times.




TOP VIRUS LIST



Win32.Refoav.A@mm

Win32.Cult.B@mm

Win32.LovGate.F@mm

Win32.Ganda.A@mm

Win32.Yahaa.P@mm/Q@mm

Win32.HLLW.Deloder.A

Win32.IISWorm.CodeRed.F

Win32.NiceHello.A@mm

Win32.Gibe.B@mm

Win32.LovGate.C@mm

VBS.Cian.C@mm

Backdoor.Sadhound.A

Worm.SQL.Slammer.A

Win32.Idtsys.A

Win32.Sobig.A@mm

Win32.Lirva.B@mm

Win32.Lirva.A@mm

Win32.Yahaa.K@mm

Win32.Yahaa.J@mm

Win32.HLLW.Lioten.A

Win32.Prestige.A@mm

Win32.Worm.Lolol.A

Win32.Bride.C@mm

Win32.Bride.B@mm

Win32.Blondy.A@mm

Win32.Bride.A@mm

Win32.PiBi.B@mm

VBS.Trojan.Carewmr.A

Win32.Apbost.A@mm

Win32.BogusBear.A@mm

Win32.MsnWorm.Rodok.A

Win32.Worm.Opaserv.A

Win32.BugBear.A@mm

Linux.Worm.Slapper.B/C

Linux.Worm.Slapper.A

Win32.PiBi.A@mm

Win32.Worm.Duload.A/B

JS.Trojan.Noclose

Win32.Manymize.A@mm

Win32.Frethem.J/K@mm

Win32.Worm.Supova Win32.Worm.Datom.A

Win32.Fosforo.A/B

Win32.Worm.Benjamin.B

Win32.Worm.Duni.A

BSD.Worm.Scalper

Backdoor.K0wbot.1.3.B

Win32.Tattona.A@mm

Win32.Yahaa.E@mm

Win32.Frethem.F@mm

VBS.Breetnee.F@mm

VBS.VBSWG.AQ@mm

Win32.Yahaa.D@mm

Win32.Enemany.A

JS.Spida.B

Win32.Worm.Benjamin

Win32.Donghe.A@mm

Win95.CIH.1049

VBS.Kagra.A@mm

Win32.Moe.A@mm

Win32.Klez.H@mm

Win32.MyLife.J@mm

Win32.MyLife.I@mm

Win32.MyLife.H@mm

Win32.MyLife.G@mm

Win32.Aplore.A@mm

Win32.MyLife.F@mm

Win32.MyLife.E@mm

Win32.MyLife.D@mm

Win32.MyLife.C@mm

VBS.Breetnee.B@mm

Win32.Cervivec.A@mm

Win32.MyLife.B@mm

Win32.Fbound.B@mm

Win32.Fbound.C@mm

Win32.MyLife.A@mm

Win32.Gibe.A@mm

VBS.Breetnee.A@mm

Win32.Zacker.F@mm

Win32.Yarner.A@mm

Win32.Kitro.A@mm

JS.Coolnow.B

JS.Coolnow.A

Win32.Rexli.A@mm

Win32.Myparty.A@mm

Win32.Led.A@mm

Win32.Klez.E@mm

JS.Gigger.A

Win32.Donut.A

SWF.LFM.926

Win32.Zacker.D@mm

Win32.Zoher.A@mm

Win32.Shoho.A@mm

VBS.Zacker.C

Win32.Rezak.A@mm

JS.Trojan.Coolsites.A

Win32.Gokar.A@mm

Win32.Zacker.A@mm

Win32.Updatr.A@mm

Win32.Gone.A@mm

Win32.Eiram.A@mm

Win32.Badtrans.B@mm

Win32.Aliz.B@mm

Win32.Klez.D@mm

Win32.Nimda.E@mm

Win32.Elkern.A

Win32.Klez.A@mm

W97M.Ethan.AK

Win32.Anset.A@mm

Win32.Rede.A@mm

VBS.HappyTime.A@mm

Win32.Vote.BC@mm

Win32.Vote.A@mm

Win32.Nimda.A@mm

CodeBlue

Win32.Magistr.B@mm

Win32.Apost.A@mm

VBS.Cuerpo.A@mm

Win32.Invalid.A@mm

Win32.Rachel.A

Trojan.JS.Offensive.A@mm

VBS.Anti700.A@mm

VBS.Stream.A

I-Worm.Sircam.A

Win95.CIH

Win32.FunLove.4099

VBS.LoveLetter.A

Win32.Weird.10240.A

I-Worm.Qaz

Win32.Kriz.4050

Win32.Prolin.A@mm

VBS.SST.A@mm


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