| Threat Alias | Number of Incidents |
| BKDR_CIADOOR.EA [Trend Micro] | 15,135 |
| Backdoor.IRC.Bot [Symantec] | 15,019 |
| Trojan.DL.VB.AAVI [PC Tools] | 14,519 |
| Trojan-Downloader.Win32.VB.bsa [Kaspersky Lab] | 10,952 |
| Downloader.gen.a [McAfee] | 10,933 |
| W32.Fontra [Symantec] | 8,362 |
| Worm.Fontra.F [PC Tools] | 8,209 |
| Virus.Win32.Fontra.c [Kaspersky Lab] | 8,047 |
| Generic.dx [McAfee] | 3,903 |
| W32.Alcra.F [Symantec] | 1,938 |
| Backdoor.IRCBot.DD [PC Tools] | 1,899 |
| WORM_GAOBOT.DF [Trend Micro] | 1,892 |
| P2P-Worm.Win32.VB.dw [Kaspersky Lab] | 1,866 |
| W32/Generic.m [McAfee] | 1,686 |
| Trojan Horse [Symantec] | 1,465 |
| Backdoor.Win32.IRCBot.aro [Kaspersky Lab] | 1,439 |
| Adware.CDN [PC Tools] | 1,279 |
| W32/Sdbot.worm [McAfee] | 1,209 |
| Adware-BDSearch [McAfee] | 1,116 |
| Backdoor.IRCBot.UUX [PC Tools] | 816 |
| W32/Alcan.worm!p2p [McAfee] | 520 |
| IRC.Backdoor.Trojan [Symantec] | 437 |
| Trojan.Crypt.E [PC Tools] | 432 |
| Worm.Win32.VB.an [Kaspersky Lab] | 426 |
| TROJ_DLOADER.FXN [Trend Micro] | 424 |
| W32.Alcra.B [Symantec] | 420 |
| WORM_VB.AS [Trend Micro] | 420 |
| Downloader-BJM [McAfee] | 402 |
| Troj/Agent-GGQ [Sophos] | 402 |
| TrojanDownloader:Win32/VB [Microsoft] | 335 |
| BrowserModifier:Win32/CNNIC [Microsoft] | 328 |
| TrojanClicker:Win32/Hatigh.C [Microsoft] | 280 |
| Mal/EncPk-KP [Sophos] | 230 |
| Mal/Generic-A [Sophos] | 225 |
| Virus.Win32.VB.FXE [Ikarus] | 224 |
| Gen.Packed [Ikarus] | 213 |
| W32/Fontra-F [Sophos] | 211 |
| Packed.Generic.233 [Symantec] | 194 |
| Trojan:Win32/VB.ZC [Microsoft] | 185 |
| WORM_VB.GZP [Trend Micro] | 184 |
| W32.SillyFDC [Symantec] | 167 |
| TROJ_VB.CEO [Trend Micro] | 165 |
| Generic.dx!fml [McAfee] | 162 |
| Adware-CDNHelper [McAfee] | 159 |
| Worm.Fontra.B [PC Tools] | 154 |
| Win32.Luder [Ikarus] | 144 |
| Win-Trojan/Xema.variant [AhnLab] | 134 |
| W32.IRCBot [Symantec] | 119 |
| W32/Autorun.worm.h [McAfee] | 116 |
| Adware.PigSearch [Symantec] | 105 |
| not-a-virus:AdWare.Win32.WSearch.j [Kaspersky Lab] | 105 |
| Virus.Win32.Fontra.c [Ikarus] | 105 |
| Win32/Fontra.worm.417792 [AhnLab] | 105 |
| Adware.DeskAdTop [PC Tools] | 104 |
| Adware-PigSearch [McAfee] | 104 |
| Keylog-Perfect.gen [McAfee] | 104 |
| TROJ_DROPPER.BKV [Trend Micro] | 104 |
| Win-Trojan/Dropper.210432 [AhnLab] | 98 |
| Backdoor.IRC!sd5 [PC Tools] | 97 |
| Downloader [Symantec] | 97 |
| Trojan-Clicker.Win32.Hatigh [Ikarus] | 93 |
| Trojan-Downloader.Win32.Suurch.awk [Kaspersky Lab] | 90 |
| P2P-Worm.Win32.VB [Ikarus] | 86 |
| W32/VB-YY [Sophos] | 86 |
| Worm:Win32/Alcan.D [Microsoft] | 86 |
| Generic BackDoor.f [McAfee] | 85 |
| Backdoor:Win32/Rbot [Microsoft] | 81 |
| Worm.Delf.BG [PC Tools] | 76 |
| Virus.Win32.Drowor.a [Kaspersky Lab] | 75 |
| Trojan-Downloader.VB!sd6 [PC Tools] | 72 |
| TrojanDownloader:Win32/VB.BK [Microsoft] | 67 |
| WORM_AQBH.A [Trend Micro] | 65 |
| Application.Win32.AdWare.Cdn [Ikarus] | 64 |
| Spyware.Perfect [Symantec] | 64 |
| Trojan.Win32.Agent [Ikarus] | 62 |
| PE_ABI.A [Trend Micro] | 61 |
| Trojan-Downloader.Win32.VB.dck [Kaspersky Lab] | 61 |
| W32/Zipwire-A [Sophos] | 61 |
| TrojanDownloader:Win32/Tonick.gen [Microsoft] | 56 |
| MonitoringTool:Win32/PerfectKeylogger [Microsoft] | 52 |
| not-a-virus:Monitor.Win32.Perflogger.ct [Kaspersky Lab] | 52 |
| Generic.Perfloger [Ikarus] | 50 |
| Backdoor.Win32.IRCBot [Ikarus] | 49 |
| Bloodhound.Unknown [Symantec] | 49 |
| Trojan.Agent!sd6 [PC Tools] | 49 |
| Trojan.Win32.Agent.bjql [Kaspersky Lab] | 49 |
| Mal/Behav-167 [Sophos] | 48 |
| Worm.Alcra.F [PC Tools] | 48 |
| IM-Worm.Win32.VB.gd [Kaspersky Lab] | 42 |
| Win-Trojan/Perfloger.57344.C [AhnLab] | 40 |
| Trojan.Fakeavalert [Symantec] | 39 |
| W32.Jacksuf.A [Symantec] | 39 |
| Backdoor.IRCBot!sd5 [PC Tools] | 38 |
| PE_CEKAR.GEN [Trend Micro] | 38 |
| W32/Cekar-A [Sophos] | 38 |
| WORM_DELF.EMJ [Trend Micro] | 38 |
| Trojan-Downloader.Small!sd5 [PC Tools] | 36 |
| Trojan-Downloader.Win32.Small.uek [Kaspersky Lab] | 36 |
| Generic VB.b [McAfee] | 35 |
| Generic Downloader.x [McAfee] | 33 |