| Threat Alias | Number of Incidents |
| W32/Virut.gen [McAfee] | 1,330 |
| W32.Virut.U [Symantec] | 816 |
| Win32.Virut.Gen.5 [PC Tools] | 790 |
| Virus.Win32.Virut.n [Kaspersky Lab] | 707 |
| Virus.Win32.Virut.q [Kaspersky Lab] | 701 |
| Win32.Virut.Gen [PC Tools] | 438 |
| Virus:Win32/Virut.AK [Microsoft] | 382 |
| W32.Virut.B [Symantec] | 380 |
| PE_VIRUT.D [Trend Micro] | 372 |
| PE_VIRUT.XO [Trend Micro] | 360 |
| PE_VIRUT.XP [Trend Micro] | 297 |
| Virus:Win32/Virut.AP [Microsoft] | 263 |
| Virus:Win32/Virut.AE [Microsoft] | 243 |
| Win32/Virut.D [AhnLab] | 200 |
| PE_VIRUT.XL [Trend Micro] | 173 |
| Virus:Win32/Virut.AF [Microsoft] | 158 |
| Virus.Win32.Sality [Ikarus] | 106 |
| Virus:Win32/Virut.L [Microsoft] | 94 |
| Trojan-Downloader.Win32.VB.bbi [Ikarus] | 93 |
| Virus.Win32.Cheburgen.a [Ikarus] | 87 |
| Virus.Win32.Virut [Ikarus] | 82 |
| Virus:Win32/Virut.K [Microsoft] | 65 |
| PE_VIRUT.XS [Trend Micro] | 50 |
| Virus:Win32/Virut.AR [Microsoft] | 49 |
| Virus.Win32.Virut.q [Ikarus] | 48 |
| Win32/Virut.C [AhnLab] | 47 |
| W32.Virut.R [Symantec] | 46 |
| W32.SillyFDC [Symantec] | 38 |
| Virus:Win32/Virut.D [Microsoft] | 34 |
| W32.Virut!gen [Symantec] | 33 |
| W32.Virut.H [Symantec] | 30 |
| PE_VIRUT.XQ [Trend Micro] | 29 |
| Virus:Win32/Virut.AH [Microsoft] | 29 |
| PE_VIRUT.XI [Trend Micro] | 27 |
| Virus.Win32.Virut.o [Ikarus] | 27 |
| Virus.Virut.na [PC Tools] | 26 |
| Virus:Win32/Virut.AG [Microsoft] | 26 |
| PE_VIRUT.XK [Trend Micro] | 25 |
| Virus.Win32.Virut.n [Ikarus] | 24 |
| Virus:Win32/Virut.AN [Microsoft] | 24 |
| W32.Spybot.Worm [Symantec] | 22 |
| Spam-Mailbot [McAfee] | 20 |
| Generic FakeAlert.d [McAfee] | 19 |
| W32.IRCBot [Symantec] | 18 |
| Generic VB.c [McAfee] | 16 |
| Worm.Win32.VB.du [Ikarus] | 16 |
| Worm.VB.YVF [PC Tools] | 15 |
| FakeAlert-AG.gen.c [McAfee] | 13 |
| PWS-Gamania.gen.a [McAfee] | 13 |
| Trojan-Spy.Win32.Banker.RM [Ikarus] | 12 |
| Virus.Win32.Cheburgen [Ikarus] | 12 |
| Virus.Win32.Virut.bo [Ikarus] | 12 |
| W32/Nachi.worm.a [McAfee] | 12 |
| Worm.Win32.Nachi [PC Tools] | 12 |
| Win-Trojan/Xema.variant [AhnLab] | 11 |
| Trojan.Win32.Pakes.cob [Kaspersky Lab] | 10 |
| Win32.Virtob.2 [Ikarus] | 10 |
| Worm.VB.FMU [PC Tools] | 10 |
| Backdoor:Win32/Poebot.BG [Microsoft] | 9 |
| Virus.Win32.Virut.au [Ikarus] | 9 |
| W32.Rajump [Symantec] | 9 |
| Win-Trojan/Downloader.11264.GK [AhnLab] | 9 |
| Backdoor:Win32/Poebot.BA [Microsoft] | 8 |
| Downloader [Symantec] | 8 |
| Trojan.Agent.VYJ [PC Tools] | 8 |
| Backdoor:Win32/Poebot.AT [Microsoft] | 7 |
| Trojan-Downloader.Win32.Small [Ikarus] | 7 |
| Trojan-Dropper.Agent [Ikarus] | 7 |
| Trojan-Dropper.Delf [Ikarus] | 7 |
| Trojan-Dropper.Kobcka [Ikarus] | 7 |
| VirTool.Win32.DelfInject [Ikarus] | 7 |
| Virus.Win32.Virtob [Ikarus] | 7 |
| Generic.Sdbot [Ikarus] | 6 |
| PE_PAGIPEF.BS-O [Trend Micro] | 6 |
| PE_RUNGBU.C [Trend Micro] | 6 |
| Trojan Horse [Symantec] | 6 |
| Trojan.Win32.Agent [Ikarus] | 6 |
| Virus.Win32.VB.bg [Ikarus] | 6 |
| Virus.Win32.Virut.ak [Ikarus] | 6 |
| Virus:Win32/Sality.AM [Microsoft] | 6 |
| Worm.Rungbu.B [PC Tools] | 6 |
| Worm.Win32.AutoRun [Ikarus] | 6 |
| Backdoor.Win32.Rbot [Ikarus] | 5 |
| Email-Worm.Win32.Runouce.B [Ikarus] | 5 |
| Hider [McAfee] | 5 |
| JS.Chir.B [PC Tools] | 5 |
| not-a-virus:Porn-Dialer.Win32.Agent.bk [Ikarus] | 5 |
| Packer.RLPack.D [Ikarus] | 5 |
| Trojan.Hider.G [PC Tools] | 5 |
| Trojan.Win32.Pakes [Ikarus] | 5 |
| Virus:Win32/Virut.gen!AI [Microsoft] | 5 |
| Virus:Win32/Virut.gen!L [Microsoft] | 5 |
| W32.Rontokbro@mm [Symantec] | 5 |
| Win32/IRCBot.worm.variant [AhnLab] | 5 |
| Win-Trojan/Spambot.7680 [AhnLab] | 5 |
| Worm.VB.ZVX [PC Tools] | 5 |
| Backdoor.Rbot [Ikarus] | 4 |
| Backdoor.Win32.IRCBot [Ikarus] | 4 |
| Backdoor.Win32.VanBot [Ikarus] | 4 |
| Downloader-BPL [McAfee] | 4 |