| Threat Alias | Number of Incidents |
| Trojan-Downloader.MisleadApp!sd6 [PC Tools] | 990 |
| Mal/Heuri-E, Mal/Emogen-N [Sophos] | 581 |
| New Malware.aj [McAfee] | 512 |
| not-a-virus:FraudTool.Win32.XPSecurityCenter.bk [Kaspersky Lab] | 441 |
| Generic Downloader.x [McAfee] | 352 |
| Trojan:Win32/Tibs.IF [Microsoft] | 322 |
| Trojan-Downloader.Win32.Hoaxer.a [Kaspersky Lab] | 321 |
| Mal/Dorf-E [Sophos] | 252 |
| TROJ_ZLOB.CEA [Trend Micro] | 244 |
| TROJ_RENOS.BX [Trend Micro] | 219 |
| Trojan.Win32.Qhost.aes [Kaspersky Lab] | 204 |
| Trojan.Qhost!sd5 [PC Tools] | 199 |
| Trojan.Peed [Ikarus] | 177 |
| Trojan.Win32.BHO.eks [Kaspersky Lab] | 156 |
| Generic PUP.x [McAfee] | 137 |
| Trojan-Downloader.Hoaxer!sd6 [PC Tools] | 125 |
| TROJ_FAKEALER.VL [Trend Micro] | 116 |
| Downloader.gen.a [McAfee] | 114 |
| Program:Win32/Antivirus2008 [Microsoft] | 113 |
| not-a-virus:FraudTool.Win32.UltimateAntivirus.cc [Kaspersky Lab] | 110 |
| Mal/FakeAV-F [Sophos] | 100 |
| not-a-virus:FraudTool.Win32.XPSecurityCenter.ay [Kaspersky Lab] | 92 |
| Mal/Generic-A [Sophos] | 89 |
| Generic PUP.z [McAfee] | 86 |
| Adware.UltimateDefend.C [PC Tools] | 79 |
| Trojan-Downloader.FakeAlert.C [PC Tools] | 77 |
| Trojan-Downloader.Win32.Adload.ma [Kaspersky Lab] | 72 |
| Trojan.FakeAlert [PC Tools] | 62 |
| Trojan-Downloader.MisleadApp!sd5 [PC Tools] | 53 |
| TROJ_RENOS.ZQ [Trend Micro] | 52 |
| Trojan.Win32.Tibs [Ikarus] | 50 |
| Mal/TinyDL-T, Mal/Heuri-E, Mal/Emogen-G [Sophos] | 46 |
| Generic FakeAlert.d [McAfee] | 43 |
| AntiVirus2008 [Symantec] | 42 |
| not-a-virus:FraudTool.Win32.MSAntivirus.r [Kaspersky Lab] | 40 |
| Mal/EncPk-EQ [Sophos] | 38 |
| FakeAlert-AG [McAfee] | 36 |
| Trojan-Downloader.Win32.Exchanger.acd [Kaspersky Lab] | 36 |
| TrojanDownloader:Win32/Cbeplay.I [Microsoft] | 36 |
| Trojan.DL.Winrean.A [PC Tools] | 33 |
| TrojanDownloader:Win32/FakeRean.gen!C [Microsoft] | 33 |
| Virus.Win32.Sality [Ikarus] | 33 |
| Mal/FakeAV-E [Sophos] | 32 |
| Trojan.Win32.BHO.fby [Kaspersky Lab] | 32 |
| TROJ_ZLOB.EXT [Trend Micro] | 31 |
| Generic.dx [McAfee] | 30 |
| Mal/EncPk-CZ [Sophos] | 30 |
| FakeAlert-XPSecCenter [McAfee] | 28 |
| Generic PUP.a [McAfee] | 28 |
| Trojan.BHO!sd6 [PC Tools] | 28 |
| XPAntivirus [Symantec] | 28 |
| FakeAlert-AQ [McAfee] | 27 |
| Mal/EncPk-BW [Sophos] | 27 |
| not-a-virus:FraudTool.Win32.XPSecurityCenter.p [Kaspersky Lab] | 27 |
| Trojan.Fakeavalert [Symantec] | 25 |
| Trojan:Win32/FakeSecSen [Microsoft] | 25 |
| Mal/Generic-A, Mal/EncPk-DA [Sophos] | 24 |
| RogueAntiSpyware.AntivirusXP2008 [PC Tools] | 24 |
| Troj/BHO-GI [Sophos] | 24 |
| Troj/Zlob-ALO [Sophos] | 24 |
| TROJ_BHO.SP [Trend Micro] | 24 |
| Trojan:Win32/FakeAlert [Microsoft] | 24 |
| Generic FakeAlert.a [McAfee] | 22 |
| Mal/EncPk-DA [Sophos] | 22 |
| not-a-virus:FraudTool.Win32.MalwareProtector.d [Kaspersky Lab] | 22 |
| not-a-virus:FraudTool.Win32.Reanimator.a [Kaspersky Lab] | 22 |
| Troj/FakeAV-AQ [Sophos] | 22 |
| Trojan:Win32/Renos.BAH [Microsoft] | 22 |
| Troj/Virtum-Gen [Sophos] | 21 |
| Trojan-Downloader.Win32.FakeRean [Ikarus] | 21 |
| Generic.Win32.Malware.Antivirus2008 [Ikarus] | 20 |
| not-a-virus:FraudTool.Win32.MSAntivirus.v [Kaspersky Lab] | 20 |
| TROJ_FAKEAV.JI [Trend Micro] | 20 |
| TrojanDownloader:Win32/Renos [Microsoft] | 19 |
| Backdoor.Win32.VB [Ikarus] | 18 |
| not-a-virus:AdWare.Win32.CashDeluxe [Ikarus] | 18 |
| RogueAntiSpyware.Antivirus 2008 [PC Tools] | 18 |
| Trojan-Downloader.Exchanger!sd6 [PC Tools] | 18 |
| Adware.Vundo.Gen!Pac.21 [PC Tools] | 16 |
| Mal/Heuri-E, Mal/Emogen-G [Sophos] | 16 |
| MalwareProtector2008 [Symantec] | 16 |
| not-a-virus:AdWare.Win32.BHO.efr [Kaspersky Lab] | 16 |
| Troj/Zlob-ALK [Sophos] | 16 |
| Trojan.Win32.BHO.dyu [Kaspersky Lab] | 16 |
| Virus.Win32.FakeAlert.S [Ikarus] | 16 |
| Vundo.gen.c [McAfee] | 16 |
| FakeAlert-AB [McAfee] | 15 |
| Program:Win32/Antispycheck [Microsoft] | 15 |
| Puper [McAfee] | 15 |
| RogueAntiSpyware.VirusResponseLab [PC Tools] | 15 |
| Troj/FakeAle-JO [Sophos] | 15 |
| TROJ_RENOS.YG [Trend Micro] | 15 |
| Trojan-Dropper.Agent [Ikarus] | 15 |
| TrojanDropper:Win32/Delf.BL [Microsoft] | 15 |
| FakeAlert-R.dll [McAfee] | 14 |
| Trojan-Downloader.Win32.FraudLoad.vdnu [Kaspersky Lab] | 14 |
| Virus.Win32.Virut.au [Ikarus] | 14 |
| not-a-virus:AdWare.Win32.AdBand.ac [Kaspersky Lab] | 13 |
| Troj/Agent-HDV [Sophos] | 13 |
| AdClicker-FC [McAfee] | 12 |