| Threat Alias | Number of Incidents |
| Trojan.BHO!sd6 [PC Tools] | 618 |
| Trojan Horse [Symantec] | 336 |
| Trojan.Zlob [Symantec] | 233 |
| Adware-BHO.gen [McAfee] | 204 |
| Trojan.Adclicker [Symantec] | 174 |
| Troj/BHO-GJ [Sophos] | 132 |
| TROJ_ZLOB.EXT [Trend Micro] | 129 |
| Generic PUP.a [McAfee] | 72 |
| Troj/DwnLdr-HFV [Sophos] | 66 |
| Troj/BHO-GI [Sophos] | 63 |
| TROJ_IEDEFENDE.B [Trend Micro] | 60 |
| TROJ_BHO.SP [Trend Micro] | 54 |
| Trojan:Win32/FakeAlert [Microsoft] | 54 |
| Puper [McAfee] | 52 |
| Downloader.gen.a [McAfee] | 46 |
| FakeAlert-R.dll [McAfee] | 45 |
| Downloader.MisleadApp [Symantec] | 36 |
| Trojan.Win32.BHO [Ikarus] | 35 |
| Trojan.Fakeavalert [Symantec] | 27 |
| Mal/Generic-A [Sophos] | 26 |
| Trojan.FakeAlert [PC Tools] | 25 |
| Trojan.Zlob [Ikarus] | 24 |
| Troj/BHO-GH [Sophos] | 20 |
| TROJ_RENOS.ACE [Trend Micro] | 18 |
| TrojanDownloader:Win32/Renos [Microsoft] | 9 |