| Threat Alias | Number of Incidents |
| W32.Virut.CF [Symantec] | 1,901 |
| W32/Scribble-B [Sophos] | 1,883 |
| Virus.Win32.Virut.ce [Kaspersky Lab] | 1,858 |
| Virus:Win32/Virut.BM [Microsoft] | 1,612 |
| Win32/Virut.F [AhnLab] | 1,407 |
| Win32/Virut.E [AhnLab] | 516 |
| Malware.Virut [PC Tools] | 422 |
| Virus:Win32/Virut.gen!O [Microsoft] | 248 |
| PE_VIRUX.H-3 [Trend Micro] | 115 |
| Virus.Win32.Virut [Ikarus] | 78 |
| PE_VIRUX.E-2 [Trend Micro] | 49 |
| Virus.Win32.Bifrose [Ikarus] | 46 |
| Virus.Win32.Sality [Ikarus] | 43 |
| Mal/Bifrose-S, W32/Scribble-B [Sophos] | 32 |
| Trojan-Downloader.Win32.Agent.czsd [Kaspersky Lab] | 32 |
| PE_VIRUX.E-3 [Trend Micro] | 25 |
| Trojan-Banker.Win32.Bancos [Ikarus] | 25 |
| not-a-virus:Porn-Dialer.Win32.Agent.bk [Ikarus] | 23 |
| Backdoor.Win32.Small.uc [Kaspersky Lab] | 20 |
| Virus.Virut.j [PC Tools] | 20 |
| Virus.Win32.Virut.bo [Ikarus] | 20 |
| PE_VIRUX.A-1 [Trend Micro] | 19 |
| PE_VIRUX.F-3 [Trend Micro] | 18 |
| PE_VIRUX.F-2 [Trend Micro] | 15 |
| Mal/Scribble-C, W32/Scribble-B [Sophos] | 13 |
| Packed.Win32.Koblu [Ikarus] | 13 |
| Backdoor.Win32.Bifrose [Ikarus] | 11 |
| Trojan-Downloader.Win32.Banload [Ikarus] | 11 |
| Trojan-Spy.Win32.Banker.RM [Ikarus] | 11 |
| Virus.Win32.JunkPoly [Ikarus] | 11 |
| W32.Virut [Ikarus] | 11 |
| Trojan.Win32.Agent2.hxw [Kaspersky Lab] | 10 |
| TrojanProxy:Win32/Slenugga.A [Microsoft] | 10 |
| Trojan.Win32.Banker [Ikarus] | 9 |
| Trojan-Clicker.Win32.VB [Ikarus] | 9 |
| Trojan-Downloader.Win32.Small [Ikarus] | 9 |
| PE_VIRUX.E-4 [Trend Micro] | 8 |
| PE_VIRUX.J-4 [Trend Micro] | 8 |
| Trojan-Clicker.Win32.Delf [Ikarus] | 8 |
| Trojan-Spy.Win32.VB [Ikarus] | 8 |
| PE_VIRUX.A [Trend Micro] | 7 |
| Virus.Win32.Virut.q [Ikarus] | 7 |
| W32/DelpBck-Gen [Sophos] | 7 |
| Mal/Behav-043, W32/Scribble-B [Sophos] | 6 |
| Trojan-Downloader.Win32.Cutwail [Ikarus] | 6 |
| VirTool.Win32.DelfInject [Ikarus] | 6 |
| Virus:Win32/Virut.gen!N [Microsoft] | 6 |
| W32.SillyFDC [Symantec] | 6 |
| Backdoor.Win32.Beastdoor [Ikarus] | 5 |
| Backdoor.Win32.Small.uh [Kaspersky Lab] | 5 |
| Mal/EncPk-FS, W32/Scribble-B [Sophos] | 5 |
| Mal/FakeVirPk-A, W32/Scribble-B [Sophos] | 5 |
| Packed.Win32.Krap.b [Kaspersky Lab] | 5 |
| Trojan.Generic [Ikarus] | 5 |
| Trojan.Win32.Patched [Ikarus] | 5 |
| Trojan-Clicker.VB.cwf [PC Tools] | 5 |
| Trojan-Downloader.LoadAdv [Ikarus] | 5 |
| Trojan-Dropper.Agent [Ikarus] | 5 |
| Trojan-Spy.Win32.Banker [Ikarus] | 5 |
| Win32.Cadoiac.A [Ikarus] | 5 |
| Win32/ReaBot.worm.60929 [AhnLab] | 5 |
| Win-Trojan/Xema.variant [AhnLab] | 5 |
| Worm.Win32.AutoRun [Ikarus] | 5 |
| Backdoor.Rustock [Ikarus] | 4 |
| Backdoor.Win32.PoisonIvy.az [Ikarus] | 4 |
| Gen.Malware [Ikarus] | 4 |
| Mal/Behav-103, Mal/Behav-043, W32/Scribble-B [Sophos] | 4 |
| P2P-Worm.Win32.Palevo [Ikarus] | 4 |
| PE_VIRUX.J-3 [Trend Micro] | 4 |
| Trojan.Pandex [PC Tools] | 4 |
| Trojan.Pandex [Symantec] | 4 |
| Trojan-Downloader.Win32.Agent.czmx [Kaspersky Lab] | 4 |
| Trojan-Downloader.Win32.Suurch [Ikarus] | 4 |
| Trojan-Downloader.Win32.Zlob [Ikarus] | 4 |
| Trojan-Dropper.Win32.ExeBind [Ikarus] | 4 |
| Trojan-Dropper.Win32.ExeBind [Kaspersky Lab] | 4 |
| TrojanDropper:Win32/ExeBind [Microsoft] | 4 |
| Trojan-PWS.Win32.LdPinch [Ikarus] | 4 |
| Virus.Virut.ce [PC Tools] | 4 |
| Virus.Win32.Virtob [Ikarus] | 4 |
| Virus:Win32/Chir.B@mm [Microsoft] | 4 |
| Backdoor.Refpron [Ikarus] | 3 |
| Backdoor.Sdbot [Symantec] | 3 |
| Backdoor.Win32.Small.ibb [Kaspersky Lab] | 3 |
| Backdoor.Win32.VB [Ikarus] | 3 |
| Downloader.Trojan [Symantec] | 3 |
| Mal/EncPk-BH, W32/Scribble-B [Sophos] | 3 |
| Mal/EncPk-JB, W32/Scribble-B [Sophos] | 3 |
| Mal/Generic-A, W32/Scribble-B [Sophos] | 3 |
| PE_VIRUX.D-1 [Trend Micro] | 3 |
| Spammer [Ikarus] | 3 |
| Trojan Horse [Symantec] | 3 |
| Trojan.Midgare.EYZ [PC Tools] | 3 |
| Trojan.Win32.Agent.bcn [Kaspersky Lab] | 3 |
| Trojan.Win32.Anomaly [Ikarus] | 3 |
| Trojan.Win32.Malagent [Ikarus] | 3 |
| Trojan.Win32.ProcessHijack [Ikarus] | 3 |
| Trojan-Banker.Win32.Banker [Ikarus] | 3 |
| TrojanDownloader:Win32/Cutwail.AQ [Microsoft] | 3 |
| VirTool.Win32.VBInject [Ikarus] | 3 |