| Threat Alias | Number of Incidents |
| W32/Virut.gen [McAfee] | 492 |
| Virus.Win32.Virut.q [Kaspersky Lab] | 475 |
| Win32.Virut.Gen.5 [PC Tools] | 406 |
| W32/Vetor-A [Sophos] | 360 |
| W32.Virut.U [Symantec] | 338 |
| Virus:Win32/Virut.AP [Microsoft] | 259 |
| Virus:Win32/Virut.L [Microsoft] | 103 |
| Win32/Virut.D [AhnLab] | 68 |
| Trojan-Downloader.Win32.VB.bbi [Ikarus] | 57 |
| Virus.Win32.Virut [Ikarus] | 43 |
| Bloodhound.Unknown [Symantec] | 36 |
| Virus.Win32.Sality [Ikarus] | 36 |
| Win32.Virut.J.Gen [PC Tools] | 26 |
| W32.SillyFDC [Symantec] | 21 |
| Generic VB.c [McAfee] | 9 |
| Spam-Mailbot [McAfee] | 8 |
| W32.Rontokbro@mm [Symantec] | 8 |
| W32.Spybot.Worm [Symantec] | 8 |
| Worm.VB.FMU [PC Tools] | 8 |
| Mal/EncPk-BW, W32/Vetor-A [Sophos] | 5 |
| Virus.Win32.Virut.bo [Ikarus] | 5 |
| Virus.Win32.Virut.q [Ikarus] | 5 |
| Worm.VB.YVF [PC Tools] | 5 |
| Worm.Win32.AutoRun [Ikarus] | 5 |
| Worm.Win32.VB.du [Ikarus] | 5 |
| FakeAlert-AG.gen.c [McAfee] | 4 |
| PWS-Banker.gen.aa [McAfee] | 4 |
| Trojan.Agent.VYJ [PC Tools] | 4 |
| Virus.Win32.Virut.ak [Ikarus] | 4 |
| W32.Rajump [Symantec] | 4 |
| W32/MoonLight.worm [McAfee] | 4 |
| Email-Worm.Win32.Tanatos.B [Ikarus] | 3 |
| Hider [McAfee] | 3 |
| Mal/Behav-164, W32/Vetor-A [Sophos] | 3 |
| not-a-virus:Porn-Dialer.Win32.Agent.bk [Ikarus] | 3 |
| PWS-Gamania.gen.a [McAfee] | 3 |
| Trojan Horse [Symantec] | 3 |
| Trojan.Hider.G [PC Tools] | 3 |
| Trojan.Win32.Pakes.cob [Kaspersky Lab] | 3 |
| Trojan-Dropper.Delf [Ikarus] | 3 |
| Trojan-Spy.Win32.Banker.RM [Ikarus] | 3 |
| Virus.Win32.Sality.s [Ikarus] | 3 |
| Virus:Win32/Virut.gen!L [Microsoft] | 3 |
| W32.IRCBot [Symantec] | 3 |
| Win32.Virtob.2 [Ikarus] | 3 |
| Worm.VB.WKJ [PC Tools] | 3 |
| Backdoor.Win32.Rbot.rqg [Kaspersky Lab] | 2 |
| Backdoor.Win32.VanBot [Ikarus] | 2 |
| Email-Worm.Win32.Brontok.A [Ikarus] | 2 |
| Email-Worm.Win32.Mydoom.bj [Ikarus] | 2 |
| Email-Worm.Win32.Runouce.B [Ikarus] | 2 |
| Email-Worm.Win32.Runouce.b [Kaspersky Lab] | 2 |
| JS.Chir.B [PC Tools] | 2 |
| Mal/Dorf-A [Sophos] | 2 |
| Trojan.Agent.DEL [PC Tools] | 2 |
| Trojan.DL.AutoIt.DO [PC Tools] | 2 |
| Trojan.Dropper [Symantec] | 2 |
| Trojan.VB.ECQ [PC Tools] | 2 |
| Trojan.VB.WAI [PC Tools] | 2 |
| Trojan.Win32.Agent [Ikarus] | 2 |
| Trojan-Dropper.Win32.Cutwail.AL [Ikarus] | 2 |
| Trojan-Dropper.Win32.Small.azk [Ikarus] | 2 |
| TrojanSpy.Bancos.AAM [PC Tools] | 2 |
| Trojan-Spy.Win32.Bancos.aam [Kaspersky Lab] | 2 |
| Virus.Win32.PurityScan.AF [Ikarus] | 2 |
| Virus.Win32.VB.bg [Ikarus] | 2 |
| Virus.Win32.Virtob [Ikarus] | 2 |
| Virus.Win32.Virut.n [Kaspersky Lab] | 2 |
| Virus:Win32/Azero.A [Microsoft] | 2 |
| W32.Mytob@mm [Symantec] | 2 |
| W32.Rontokbro.AN@mm [Symantec] | 2 |
| W32.Svich [Symantec] | 2 |
| W32/Autorun.worm.bx.gen [McAfee] | 2 |
| W32/Dref-AW [Sophos] | 2 |
| W32/Nachi.worm.a [McAfee] | 2 |
| W32/Nuwar@MM [McAfee] | 2 |
| Win32/Virut.C [AhnLab] | 2 |
| Win-Trojan/Agent.11264.JZ [AhnLab] | 2 |
| Win-Trojan/Agent.9216.FL [AhnLab] | 2 |
| Win-Trojan/Downloader.11264.GK [AhnLab] | 2 |
| Win-Trojan/Downloader.8704.XA [AhnLab] | 2 |
| Win-Trojan/Spambot.7680 [AhnLab] | 2 |
| Win-Trojan/Xema.variant [AhnLab] | 2 |
| Worm.Poebot.FG [PC Tools] | 2 |
| Worm.SdBot.GAP [PC Tools] | 2 |
| Worm.Sohanad.R [PC Tools] | 2 |
| Worm.VB.YFU [PC Tools] | 2 |
| Worm.VB.ZUI [PC Tools] | 2 |
| Worm.Win32.Nachi [PC Tools] | 2 |
| Worm:Win32/Autorun.OX [Microsoft] | 2 |
| Backdoor.Agent.IVA [PC Tools] | 1 |
| Backdoor.DsBot.AM [PC Tools] | 1 |
| Backdoor.IRCBot.AAH [PC Tools] | 1 |
| Backdoor.Small.VZJ [PC Tools] | 1 |
| Backdoor.VanBot.IK [PC Tools] | 1 |
| Backdoor.Win32.Agent.dqb [Kaspersky Lab] | 1 |
| Backdoor.Win32.Breplibot [Ikarus] | 1 |
| Backdoor.Win32.EggDrop.v [Kaspersky Lab] | 1 |
| Backdoor.Win32.IRCBot [Ikarus] | 1 |
| Backdoor.Win32.IRCBot.ceq [Kaspersky Lab] | 1 |