| Threat Alias | Number of Incidents |
| W32/Virut.gen [McAfee] | 296 |
| Win32.Virut.Gen.5 [PC Tools] | 207 |
| W32/Vetor-A [Sophos] | 173 |
| Virus.Win32.Virut.n [Kaspersky Lab] | 152 |
| W32.Virut.U [Symantec] | 152 |
| Virus:Win32/Virut.AF [Microsoft] | 149 |
| Virus.Win32.Virut.q [Kaspersky Lab] | 96 |
| Virus.Win32.Virut.o [Kaspersky Lab] | 75 |
| Bloodhound.Unknown [Symantec] | 54 |
| Win32.Virut.G [PC Tools] | 45 |
| W32.SillyFDC [Symantec] | 33 |
| Win32/Virut.D [AhnLab] | 30 |
| Virus.Win32.Virut.o [Ikarus] | 27 |
| Virus.Win32.Sality [Ikarus] | 26 |
| Virus:Win32/Virut.AE [Microsoft] | 21 |
| Virus.Win32.Virut [Ikarus] | 17 |
| Worm.VB.FMU [PC Tools] | 11 |
| Generic VB.c [McAfee] | 10 |
| Worm.VB.YVF [PC Tools] | 10 |
| Hider [McAfee] | 8 |
| Trojan.Hider.G [PC Tools] | 8 |
| Trojan.VB.EPP [PC Tools] | 7 |
| Virus.Win32.VB.bg [Kaspersky Lab] | 7 |
| W32.Rontokbro@mm [Symantec] | 7 |
| Worm.VB.ZUI [PC Tools] | 6 |
| Spam-Mailbot [McAfee] | 5 |
| W32.Rontokbro.X@mm [Symantec] | 5 |
| Worm.Sohanad.R [PC Tools] | 5 |
| Generic FakeAlert.d [McAfee] | 4 |
| PWS-Gamania.gen.a [McAfee] | 4 |
| Trojan.Win32.VB.atg [Kaspersky Lab] | 4 |
| W32.SillyDC [Symantec] | 4 |
| Backdoor.Trojan [Symantec] | 3 |
| I-Worm.Brontok.CH [PC Tools] | 3 |
| W32.Gammima.AG [Symantec] | 3 |
| W32.IRCBot [Symantec] | 3 |
| W32/Bindo.worm [McAfee] | 3 |
| W32/MoonLight.worm [McAfee] | 3 |
| Worm.P2P.Malas.Gen [PC Tools] | 3 |
| Backdoor.Win32.PoeBot.C [Ikarus] | 2 |
| Downloader-ASH.gen.b [McAfee] | 2 |
| Email-Worm.Win32.Brontok [Ikarus] | 2 |
| Email-Worm.Win32.Brontok.N [Ikarus] | 2 |
| I-Worm.Brontok.CU [PC Tools] | 2 |
| Mal/Behav-164 [Sophos] | 2 |
| PWS-Gamania.gen.c [McAfee] | 2 |
| Trojan Horse [Symantec] | 2 |
| Trojan-Clicker.Win32.VB [Ikarus] | 2 |
| TrojanSpy.Ardamax.WQ [PC Tools] | 2 |
| Trojan-Spy.Win32.Banker.RM [Ikarus] | 2 |
| Virus.Win32.VB.eg [Kaspersky Lab] | 2 |
| Virus:Win32/Virut.gen!L [Microsoft] | 2 |
| W32.Lunalight@mm [Symantec] | 2 |
| W32/Autorun.worm.bl [McAfee] | 2 |
| W32/Autorun.worm.bx.gen [McAfee] | 2 |
| W32/Autorun.worm.f [McAfee] | 2 |
| Win-Trojan/Agent.19456.OF [AhnLab] | 2 |
| Win-Trojan/Agent.8704.PW [AhnLab] | 2 |
| Worm.Sohanad.Y [PC Tools] | 2 |
| Worm.Sohanad.Z [PC Tools] | 2 |
| Worm:Win32/Malas.gen [Microsoft] | 2 |
| Application.Ardamax_Keylogger [PC Tools] | 1 |
| Backdoor.Agent.IVN [PC Tools] | 1 |
| Backdoor.Agent.LBN [PC Tools] | 1 |
| Backdoor.BeastDoor.AX [PC Tools] | 1 |
| Backdoor.Small.VZJ [PC Tools] | 1 |
| Backdoor.VanBot.KB [PC Tools] | 1 |
| Backdoor.Win32.Frauder.dk [Ikarus] | 1 |
| Backdoor.Win32.Nepoe.em [Kaspersky Lab] | 1 |
| Backdoor.Win32.UltimateDefender [Ikarus] | 1 |
| Backdoor:Win32/Poebot.AD [Microsoft] | 1 |
| Backdoor:Win32/Poebot.AT [Microsoft] | 1 |
| Backdoor:Win32/Poebot.BA [Microsoft] | 1 |
| Backdoor:Win32/Poebot.BG [Microsoft] | 1 |
| BackDoor-AMQ [McAfee] | 1 |
| Email-Worm.Win32.Runouce.B [Ikarus] | 1 |
| Email-Worm.Win32.VB.cb [Ikarus] | 1 |
| Generic PWS.ak [McAfee] | 1 |
| Generic.Sdbot [Ikarus] | 1 |
| IM-Worm.Win32.VB [Ikarus] | 1 |
| IRC Trojan [Symantec] | 1 |
| I-Worm.Brontok.CE [PC Tools] | 1 |
| I-Worm.Brontok.CJ [PC Tools] | 1 |
| I-Worm.Brontok.CP [PC Tools] | 1 |
| I-Worm.Brontok.DL [PC Tools] | 1 |
| I-Worm.Brontok.EG [PC Tools] | 1 |
| I-Worm.Brontok.R [PC Tools] | 1 |
| Mal/Behav-043, W32/Vetor-A [Sophos] | 1 |
| Mal/Behav-164, W32/Vetor-DAM [Sophos] | 1 |
| Mal/Generic-A [Sophos] | 1 |
| not-a-Virus.Hacktool.Keygen [Ikarus] | 1 |
| P2P-Worm.Win32.Malas.g [Ikarus] | 1 |
| Suspicious.MH690 [Symantec] | 1 |
| Trojan.Agent.DSR [PC Tools] | 1 |
| Trojan.Agent.VYJ [PC Tools] | 1 |
| Trojan.DL.Agent.ECQG [PC Tools] | 1 |
| Trojan.DL.AutoIt.DO [PC Tools] | 1 |
| Trojan.DR.Small.UPY [PC Tools] | 1 |
| Trojan.Jonben.A [PC Tools] | 1 |
| Trojan.PWS.OnLineGames.BKA [PC Tools] | 1 |