| Threat Alias | Number of Incidents |
| Adware-Fastlook [McAfee] | 9,396 |
| Trojan.Win32.Agent.abpb [Kaspersky Lab] | 6,704 |
| TROJ_NSIS.AL [Trend Micro] | 3,567 |
| Adware:Win32/SearchToolBar [Microsoft] | 3,402 |
| Trojan.Dropper [Symantec] | 3,153 |
| Generic MultiDropper.d [McAfee] | 2,523 |
| Trojan-Downloader.Agent.AEN [PC Tools] | 1,189 |
| Virus.Trojan.Win32.Agent.abpb [Ikarus] | 926 |
| Generic.dx [McAfee] | 636 |
| Trojan Horse [Symantec] | 548 |
| Trojan.Win32.Agent [Ikarus] | 438 |
| BackDoor-EFN [McAfee] | 300 |
| Mal/Generic-A [Sophos] | 205 |
| Packed.Generic.181 [Symantec] | 200 |
| Trojan.Win32.Agent.azdd [Kaspersky Lab] | 196 |
| Trojan.Zlob [Ikarus] | 173 |
| Trojan:Win32/Meredrop [Microsoft] | 158 |
| Trojan.Win32.Agent.arfd [Kaspersky Lab] | 146 |
| Generic Downloader.z [McAfee] | 144 |
| W32.Spamuzle [Symantec] | 121 |
| Troj/PWS-AZN [Sophos] | 120 |
| TROJ_AGENT.ANAV [Trend Micro] | 108 |
| TROJ_AGENT.APDC [Trend Micro] | 108 |
| Downloader [Symantec] | 98 |
| Trojan.Win32.Agent.aomy [Kaspersky Lab] | 91 |
| Troj/Backdr-AE [Sophos] | 90 |
| W32.Mydoom.A@mm [Symantec] | 90 |
| Worm:Win32/Mariofev.A [Microsoft] | 90 |
| W32/MarioF-B, W32/MarioF-B [Sophos] | 81 |
| W32/Mariofev.worm [McAfee] | 81 |
| Trojan.Win32.Agent.kkp [Kaspersky Lab] | 77 |
| Win-Trojan/Xema.variant [AhnLab] | 64 |
| Trojan.Win32.Agent.kwy [Kaspersky Lab] | 63 |
| Troj/Agent-GXJ [Sophos] | 61 |
| Trojan.Win32.Agent.cbzc [Kaspersky Lab] | 60 |
| Backdoor.Trojan [Symantec] | 55 |
| Trojan.Win32.Agent.bjql [Kaspersky Lab] | 49 |
| Trojan.Win32.Agent.rap [Kaspersky Lab] | 49 |
| W32/MarioF-Gen, Mal/TinyDL-T [Sophos] | 49 |
| Win-Trojan/Mariofev.94208 [AhnLab] | 45 |
| Trojan.Win32.Agent.airw [Kaspersky Lab] | 42 |
| Rootkit.Win32.Small [Ikarus] | 40 |
| TrojanDownloader:Win32/Perkesh.gen!A [Microsoft] | 40 |
| Win32.SuspectCrc [Ikarus] | 39 |
| HackTool.Win32.Patcher.A [Ikarus] | 37 |
| Trojan.Win32.Agent.asjk [Kaspersky Lab] | 37 |
| Trojan.Win32.Agent.bkpt [Kaspersky Lab] | 37 |
| TROJ_AGENT.AGXE [Trend Micro] | 36 |
| Trojan.KillAV [Symantec] | 35 |
| Win-Trojan/Agent.24576.AMT [AhnLab] | 35 |
| Generic Downloader.x [McAfee] | 32 |
| Infostealer [Symantec] | 32 |
| Trojan.Win32.BHO.d [Ikarus] | 32 |
| Generic.dx!gm [McAfee] | 30 |
| Generic BackDoor [McAfee] | 29 |
| not-a-virus:AdWare.Win32.Zhongsou.bb [Kaspersky Lab] | 29 |
| Trojan.Win32.Agent.airv [Kaspersky Lab] | 28 |
| Virus.Trojan.Win32.Agent.kkp [Ikarus] | 28 |
| AdClicker-GI [McAfee] | 26 |
| AdWare.Win32.AdRotator [Ikarus] | 26 |
| Adware:Win32/AdRotator [Microsoft] | 26 |
| Trojan.Win32.Agent.cbpp [Kaspersky Lab] | 24 |
| Generic Dropper [McAfee] | 22 |
| Mal/EncPk-CK [Sophos] | 22 |
| TrojanDropper:Win32/Srizbi.gen!D [Microsoft] | 22 |
| Dropper/Mariofev.45056 [AhnLab] | 21 |
| Mal/Inet-Fam [Sophos] | 21 |
| Backdoor.Rustock.B [Symantec] | 20 |
| Generic PUP.x [McAfee] | 20 |
| Generic PWS.y!f [McAfee] | 20 |
| Trojan.Win32.Agent.auuw [Kaspersky Lab] | 20 |
| Win-Trojan/Agent.29184.KB [AhnLab] | 20 |
| Trojan:Win32/Trafog!rts [Microsoft] | 19 |
| Backdoor:WinNT/Rustock.E [Microsoft] | 18 |
| Trojan.Win32.Agent.aswl [Kaspersky Lab] | 18 |
| TrojanSpy:Win32/Festeal.C [Microsoft] | 18 |
| Generic PWS.y [McAfee] | 17 |
| Trojan.Fakeavalert [Symantec] | 16 |
| Win-Trojan/Agent.5120.EM [AhnLab] | 15 |
| Backdoor:Win32/Small.D [Microsoft] | 14 |
| Generic.Win32.Malware [Ikarus] | 14 |
| Trojan-Dropper [Ikarus] | 14 |
| PWS:Win32/Prefsap.gen [Microsoft] | 13 |
| Dropper/Ezvsk.777690 [AhnLab] | 12 |
| Mal/Emogen-R [Sophos] | 12 |
| Spammer.WinNT.Srizbi.B [Ikarus] | 12 |
| Spammer:WinNT/Srizbi.gen!B [Microsoft] | 12 |
| Trojan.Win32.Agent.acvu [Kaspersky Lab] | 12 |
| Trojan.Win32.Agent.axrm [Kaspersky Lab] | 12 |
| Trojan.Win32.Agent.bctq [Kaspersky Lab] | 12 |
| Trojan.Win32.Agent.cboh [Kaspersky Lab] | 12 |
| Trojan-Dropper.Rkit.AZ [Ikarus] | 12 |
| Backdoor.Winnt [Ikarus] | 11 |
| Mal/Behav-160 [Sophos] | 11 |
| New Malware.aj [McAfee] | 11 |
| Packed.Generic.57 [Symantec] | 11 |
| Trojan.Agent.B!ct [PC Tools] | 11 |
| Trojan.Win32.Agent.avft [Kaspersky Lab] | 11 |
| Trojan-Downloader [Ikarus] | 11 |
| VirTool:Win32/CeeInject.gen!J [Microsoft] | 11 |