| Threat Alias | Number of Incidents |
| Trojan Horse [Symantec] | 613 |
| Mal/Generic-A [Sophos] | 341 |
| Trojan-Dropper.Agent [Ikarus] | 302 |
| Downloader [Symantec] | 262 |
| Trojan-Dropper.Agent!sd6 [PC Tools] | 198 |
| Hacktool.Rootkit [Symantec] | 192 |
| Trojan:Win32/Meredrop [Microsoft] | 170 |
| Hacktool.Rootkit!sd6 [PC Tools] | 160 |
| VirTool:WinNT/Rootkitdrv.GH [Microsoft] | 154 |
| Trojan.Dropper [Symantec] | 146 |
| Mal/EncPk-CK [Sophos] | 127 |
| TrojanDropper:Win32/Srizbi.gen!D [Microsoft] | 127 |
| Rootkit.Win32.Agent.hji [Kaspersky Lab] | 121 |
| Troj/Mdrop-BZX [Sophos] | 110 |
| Mal/Behav-009 [Sophos] | 107 |
| Trojan-Dropper.Win32.Agent.yjl [Kaspersky Lab] | 106 |
| Win-Trojan/Downloader.33720 [AhnLab] | 100 |
| Trojan.Zlob [Ikarus] | 82 |
| Troj/PWS-AXY [Sophos] | 72 |
| Trojan-Dropper.Win32.Agent.aeok [Kaspersky Lab] | 72 |
| Backdoor.Trojan [Symantec] | 65 |
| Infostealer.Gampass [Symantec] | 58 |
| Win32.SuspectCrc [Ikarus] | 50 |
| Trojan.Win32.Agent.airv [Kaspersky Lab] | 49 |
| Trojan.DL.Agent.DUTG [PC Tools] | 48 |
| Win-Trojan/Agent.4096.EI [AhnLab] | 44 |
| Trojan-Dropper.Rkit.AZ [Ikarus] | 42 |
| W32.DSS.Trojan [Symantec] | 42 |
| Trojan-Dropper.Win32.VB [Ikarus] | 37 |
| Troj/Keygen-BI [Sophos] | 36 |
| Trojan.Pandex [Symantec] | 34 |
| Trojan-Dropper.Win32.Agent.ahfn [Kaspersky Lab] | 33 |
| Win-Trojan/Xema.variant [AhnLab] | 33 |
| Cryp_Xed-3 [Trend Micro] | 32 |
| Mal/Dropper-AC [Sophos] | 32 |
| Trojan.Win32.Runner [Ikarus] | 30 |
| Trojan-Dropper.VB!sd6 [PC Tools] | 29 |
| Trojan-Dropper.Win32.Malf [Ikarus] | 29 |
| Infostealer [Symantec] | 28 |
| Mal/Packer [Sophos] | 27 |
| Trojan-Dropper.SSS [Ikarus] | 27 |
| Backdoor.Graybird [Symantec] | 26 |
| Trojan.Win32.Agent [Ikarus] | 25 |
| Rootkit.Win32.Agent [Ikarus] | 24 |
| TrojanDropper:Win32/Malf.gen [Microsoft] | 24 |
| W32.SillyFDC [Symantec] | 24 |
| Trojan-Dropper.Small!sd5 [PC Tools] | 23 |
| Trojan-Dropper.Win32.Delf [Ikarus] | 23 |
| Trojan.Agent!sd6 [PC Tools] | 22 |
| Trojan-Dropper.Win32.Agent.agfl [Kaspersky Lab] | 21 |
| Rootkit.DR.Podnuha.Gen [PC Tools] | 20 |
| Suspicious.MH690 [Symantec] | 20 |
| TrojanDropper:Win32/Dunik!rts [Microsoft] | 20 |
| Backdoor.Bifrose [Symantec] | 19 |
| Trojan-Dropper.Agent!sd5 [PC Tools] | 19 |
| Trojan-Dropper.Win32.Cutwail [Ikarus] | 19 |
| not-a-virus:Keygen.Adobe [Ikarus] | 18 |
| Troj/BadCab-A [Sophos] | 18 |
| TrojanDropper:Win32/Emold.C [Microsoft] | 18 |
| Win-Trojan/Keygen.35343 [AhnLab] | 18 |
| Trojan.Farfli [Symantec] | 17 |
| Trojan.Win32.Meredrop [Ikarus] | 17 |
| Trojan-Dropper.Win32.Small [Ikarus] | 17 |
| Backdoor.FlyAgent!sd6 [PC Tools] | 16 |
| Backdoor.Win32.FlyAgent [Ikarus] | 16 |
| Backdoor.Win32.FlyAgent.lz [Kaspersky Lab] | 16 |
| TROJ_SHEUR.BMD [Trend Micro] | 16 |
| Trojan-Dropper.Vb.1 [Ikarus] | 16 |
| Trojan-Dropper.Win32.Parsi.hf [Kaspersky Lab] | 16 |
| TrojanDropper:Win32/Agent [Microsoft] | 16 |
| TrojanDropper:Win32/Silly_P2P.B [Microsoft] | 16 |
| Backdoor.Agent!sd6 [PC Tools] | 15 |
| Mal/Dropper-G [Sophos] | 15 |
| Trojan.Generic [Ikarus] | 15 |
| Trojan-Dropper.Win32.Agent.fcu [Kaspersky Lab] | 15 |
| TrojanDropper:Win32/Cutwail.AL [Microsoft] | 15 |
| TrojanDropper:Win32/Opachki.A [Microsoft] | 15 |
| W32.Spybot.Worm [Symantec] | 15 |
| Mal/TibsPk-A [Sophos] | 14 |
| Trojan:Win32/Relbma.A [Microsoft] | 14 |
| VirTool:Win32/DelfInject.gen!L [Microsoft] | 14 |
| Mal/Pushdo-A [Sophos] | 13 |
| Troj/Mdrop-BRN [Sophos] | 13 |
| Trojan-Downloader.Harnig.ZC [Ikarus] | 13 |
| Trojan-Dropper.Win32.Delf.wj [Kaspersky Lab] | 13 |
| TrojanDropper:Win32/Microjoin.AC [Microsoft] | 13 |
| TrojanDropper:Win32/Small [Microsoft] | 13 |
| Backdoor.Win32.Agent.qlv [Kaspersky Lab] | 12 |
| HackTool:Win32/Keygen [Microsoft] | 12 |
| Mal/PWS-Fam, Mal/EncPk-GF [Sophos] | 12 |
| Packed.Generic.199 [Symantec] | 12 |
| TROJ_DROPPER.DEX [Trend Micro] | 12 |
| TROJ_MICROJOIN.W [Trend Micro] | 12 |
| Trojan.Adclicker [Symantec] | 12 |
| Trojan.PWS.OnLineGames.BCJ [PC Tools] | 12 |
| Trojan-Dropper.Win32.Agent.bsk [Kaspersky Lab] | 12 |
| Trojan-Dropper.Win32.KGen [Ikarus] | 12 |
| Trojan-Dropper.Win32.VB.bpz [Kaspersky Lab] | 12 |
| VirTool:Win32/Vtub.EL [Microsoft] | 12 |
| Backdoor.Bifrose!sd6 [PC Tools] | 11 |