| Threat Alias | Number of Incidents |
| W32.Virut.CF [Symantec] | 3,094 |
| W32/Scribble-B [Sophos] | 2,772 |
| Virus:Win32/Virut.BM [Microsoft] | 2,718 |
| Win32/Virut.F [AhnLab] | 2,222 |
| W32/Virut.n.gen [McAfee] | 1,858 |
| Win32/Virut.E [AhnLab] | 827 |
| New Win32 [McAfee] | 490 |
| Malware.Virut [PC Tools] | 434 |
| Virus:Win32/Virut.gen!O [Microsoft] | 294 |
| W32/Virut.n [McAfee] | 285 |
| W32/Scribble-A [Sophos] | 269 |
| New Win32.g4 [McAfee] | 178 |
| Virus.Win32.Virut [Ikarus] | 136 |
| Virus.Win32.Sality [Ikarus] | 129 |
| PE_VIRUX.H-3 [Trend Micro] | 121 |
| Mal/HckPk-A, W32/Scribble-B [Sophos] | 93 |
| New Poly Win32 [McAfee] | 92 |
| Virus:Win32/Virut.gen!E [Microsoft] | 87 |
| Virus.Win32.Bifrose [Ikarus] | 67 |
| Mal/Bifrose-S, W32/Scribble-B [Sophos] | 55 |
| PE_VIRUX.E-2 [Trend Micro] | 50 |
| PE_VIRUX.A-1 [Trend Micro] | 46 |
| Virus.Win32.Virut.bo [Ikarus] | 45 |
| Trojan-Banker.Win32.Bancos [Ikarus] | 38 |
| PE_VIRUX.E-3 [Trend Micro] | 34 |
| BackDoor-CEP.gen.au [McAfee] | 31 |
| Spam-Mailbot [McAfee] | 31 |
| PE_VIRUX.A [Trend Micro] | 30 |
| not-a-virus:Porn-Dialer.Win32.Agent.bk [Ikarus] | 25 |
| Trojan-Downloader.Win32.Cutwail [Ikarus] | 25 |
| PE_VIRUX.F-2 [Trend Micro] | 24 |
| PE_VIRUX.F-3 [Trend Micro] | 23 |
| W32.Virut [Ikarus] | 23 |
| Backdoor.Rbot [Ikarus] | 22 |
| Trojan-Spy.Win32.Banker.RM [Ikarus] | 22 |
| W32/Sdbot.worm.gen.g [McAfee] | 22 |
| WORM_RBOT.GEN-1 [Trend Micro] | 22 |
| W32/Rbot-Fam, W32/Scribble-B [Sophos] | 21 |
| Worm.Akbot.Gen [PC Tools] | 21 |
| Trojan.Win32.Banker [Ikarus] | 20 |
| Backdoor.Win32.Popwin [Ikarus] | 19 |
| Mal/Generic-A [Sophos] | 19 |
| Exploit.Win32.IMG-WMF [Ikarus] | 18 |
| Virus.Virut.j [PC Tools] | 18 |
| Virus.Win32.Virut.q [Ikarus] | 18 |
| Email-Worm.Win32.Mydoom.bj [Ikarus] | 17 |
| Mal/HckPk-A [Sophos] | 17 |
| Trojan:Win32/Puzlice.A [Microsoft] | 17 |
| W32.Mytob@mm [Symantec] | 17 |
| Mal/Scribble-C, W32/Scribble-B [Sophos] | 16 |
| New Win32.g3 [McAfee] | 16 |
| Trojan.Agent.DEL [PC Tools] | 16 |
| TrojanDropper:Win32/Puzlice.A [Microsoft] | 16 |
| Trojan-Spy.Win32.VB [Ikarus] | 16 |
| Backdoor.Win32.Bifrose [Ikarus] | 15 |
| Packed.Win32.Koblu [Ikarus] | 15 |
| Backdoor.Win32.Beastdoor [Ikarus] | 14 |
| New Win32.g2 [McAfee] | 14 |
| Trojan-Dropper.Agent [Ikarus] | 14 |
| Trojan Horse [Symantec] | 12 |
| Virus.Win32.JunkPoly [Ikarus] | 12 |
| VirTool.Win32.DelfInject [Ikarus] | 11 |
| Virus.Win32.Virtob [Ikarus] | 11 |
| Virus:Win32/Virut.gen!M [Microsoft] | 11 |
| Mal/Bifrose-S, Mal/Bifrose-S, W32/Scribble-B [Sophos] | 10 |
| Packed.Win32.TDSS.z [Kaspersky Lab] | 10 |
| PE_VIRUX.D-1 [Trend Micro] | 10 |
| PWS-Banker [McAfee] | 10 |
| Spammer [Ikarus] | 10 |
| Spy-Agent.bv.gen.b [McAfee] | 10 |
| Trojan.Win32.Patched [Ikarus] | 10 |
| Backdoor.Win32.Refpron [Ikarus] | 9 |
| Spam-Mailbot.h.gen.a [McAfee] | 9 |
| Suspicious.MH690 [Symantec] | 9 |
| Trojan.Fakeavalert [Symantec] | 9 |
| Trojan-Clicker.Win32.Delf [Ikarus] | 9 |
| Trojan-Clicker.Win32.VB [Ikarus] | 9 |
| Downloader [Symantec] | 8 |
| Mal/Behav-043, W32/Scribble-B [Sophos] | 8 |
| PE_VIRUX.J-4 [Trend Micro] | 8 |
| Virus.Win32.Virut.n [Ikarus] | 8 |
| Win32.Cadoiac.A [Ikarus] | 8 |
| Win-Trojan/Xema.variant [AhnLab] | 8 |
| Trojan.Win32.VB [Ikarus] | 7 |
| Trojan-Downloader.Win32.Banload [Ikarus] | 7 |
| Virus:Win32/Virut.gen!N [Microsoft] | 7 |
| W32/DelpBck-Gen [Sophos] | 7 |
| Worm:Win32/Neeris.AN [Microsoft] | 7 |
| Backdoor:Win32/Refpron.M [Microsoft] | 6 |
| Cutwail [McAfee] | 6 |
| Generic Dropper.ln [McAfee] | 6 |
| Generic PWS.ak [McAfee] | 6 |
| New Malware.bj [McAfee] | 6 |
| PE_VIRUX.E-4 [Trend Micro] | 6 |
| Trojan.Adclicker [Symantec] | 6 |
| Trojan:Win32/Winwebsec [Microsoft] | 6 |
| Trojan-Downloader.Win32.Small.amcd [Kaspersky Lab] | 6 |
| Trojan-Dropper [Ikarus] | 6 |
| Virus.W32.Sality [Ikarus] | 6 |
| W32.Imaut [Symantec] | 6 |