| Threat Alias | Number of Incidents |
| Trojan.Virantix.C [Symantec] | 508 |
| Generic Dropper.bu [McAfee] | 404 |
| TrojanDownloader:Win32/Renos [Microsoft] | 357 |
| Trojan-Clicker.Win32.Klik [Ikarus] | 294 |
| Generic FakeAlert.d [McAfee] | 266 |
| Trojan.Win32.FakePowav [Ikarus] | 217 |
| TrojanDownloader:Win32/FakeRean.gen!C [Microsoft] | 193 |
| Trojan.Fakeavalert [Symantec] | 171 |
| VirTool.Win32.Obfuscator.DF [Ikarus] | 136 |
| FakeAlert-XPSecCenter [McAfee] | 131 |
| Adware.Agent.ZO [PC Tools] | 112 |
| Downloader.MisleadApp [Symantec] | 111 |
| Trojan-Downloader.Win32.FraudLoad.vdjr [Kaspersky Lab] | 108 |
| Trojan:Win32/Wantvi.I [Microsoft] | 104 |
| Trojan.Win32.Agent2.aul [Kaspersky Lab] | 100 |
| Trojan.Agent [PC Tools] | 90 |
| Win-Trojan/Xema.variant [AhnLab] | 81 |
| Virus.Win32.Virut.au [Ikarus] | 76 |
| Trojan.Virantix!sd6 [PC Tools] | 63 |
| Backdoor.Win32.UltimateDefender.gen [Kaspersky Lab] | 62 |
| Backdoor.Tidserv [Symantec] | 53 |
| Trojan:Win32/Ertfor.A [Microsoft] | 52 |
| Trojan-Downloader.Win32.FakeRean [Ikarus] | 47 |
| Virus.Win32.Zbot.AQM [Ikarus] | 39 |
| TrojanClicker:Win32/Klik [Microsoft] | 37 |
| Virus.Win32.FakeAlert.AJ [Ikarus] | 35 |
| Trojan Horse [Symantec] | 34 |
| Backdoor.Win32.UltimateDefender [Ikarus] | 33 |
| Generic.dx [McAfee] | 32 |
| Virus.Win32.Lighty [Ikarus] | 28 |
| DNSChanger.gen [McAfee] | 26 |
| Trojan:Win32/Alureon.gen!N [Microsoft] | 26 |
| Downloader-BKK [McAfee] | 25 |
| TrojanDownloader:Win32/FakeRean [Microsoft] | 23 |
| Downloader [Symantec] | 21 |
| Trojan.TDSServ [PC Tools] | 21 |
| TrojanDownloader:Win32/Renos.FJ [Microsoft] | 20 |
| Trojan.Renos.Gen!Pac.10 [PC Tools] | 17 |
| TrojanDropper:Win32/Olmarik.A [Microsoft] | 15 |
| PWS:Win32/Ldpinch.BO [Microsoft] | 14 |
| Trojan:Win32/Renos.I [Microsoft] | 14 |
| Trojan.Fakeavalert!sd6 [PC Tools] | 13 |
| TrojanClicker:Win32/Hatigh.C [Microsoft] | 13 |
| Hoax.Win32.Renos.ebd [Kaspersky Lab] | 10 |
| Mal/Generic-A [Sophos] | 10 |
| Trojan:Win32/FakePowav [Microsoft] | 10 |
| Backdoor.Win32.TDSS.bnk [Kaspersky Lab] | 9 |
| Downloader.gen.a [McAfee] | 9 |
| Generic FakeAlert.a [McAfee] | 9 |
| Hoax.Win32.Renos.ffk [Kaspersky Lab] | 9 |
| not-a-virus:FraudTool.Win32.XPSecurityCenter.ai [Kaspersky Lab] | 9 |
| TROJ_MALBEHV.MCS [Trend Micro] | 9 |
| Trojan.Win32.Agent.avul [Kaspersky Lab] | 9 |
| Trojan-Downloader.MisleadApp!sd6 [PC Tools] | 9 |
| Generic Downloader.x [McAfee] | 8 |
| Olmarik [McAfee] | 8 |
| Trojan:Win32/Alureon.gen!J [Microsoft] | 8 |
| Trojan-Downloader.Win32.FraudLoad.vdnu [Kaspersky Lab] | 8 |
| VirTool:Win32/DelfInject.gen!AM [Microsoft] | 8 |
| Trojan.Win32.Crypt.cz [Kaspersky Lab] | 7 |
| TrojanClicker:Win32/Delf.P [Microsoft] | 7 |
| Generic PUP.x [McAfee] | 6 |
| Infostealer.Banker.C [Symantec] | 6 |
| not-a-virus:FraudTool.Win32.XPAntiSpyware2009.i [Kaspersky Lab] | 6 |
| Packer.Malware.Lighty.O [Ikarus] | 6 |
| Trojan.Win32.Ertfor.A [Ikarus] | 6 |
| XPSecurityCenter [Symantec] | 6 |
| Backdoor.Tidserv!sd6 [PC Tools] | 5 |
| Backdoor.Trojan [Symantec] | 5 |
| Backdoor.Win32.UltimateDefender.gml [Kaspersky Lab] | 5 |
| Generic BackDoor [McAfee] | 5 |
| Hoax.Win32.Renos [Ikarus] | 5 |
| PWS-Banker [McAfee] | 5 |
| Trojan.Virantix [Symantec] | 5 |
| Trojan-Clicker.Win32.Delf.akw [Kaspersky Lab] | 5 |
| Virus.Win32.Lighty.C [Ikarus] | 5 |
| Backdoor.IRC!sd6 [PC Tools] | 4 |
| Backdoor.Win32.TDSS.bnh [Kaspersky Lab] | 4 |
| Backdoor.Win32.TDSS.bot [Kaspersky Lab] | 4 |
| Backdoor.Win32.UltimateDefender.gua [Kaspersky Lab] | 4 |
| Hoax.Win32.Renos.fei [Kaspersky Lab] | 4 |
| Hoax.Win32.Renos.fex [Kaspersky Lab] | 4 |
| Hoax.Win32.Renos.fge [Kaspersky Lab] | 4 |
| Hoax.Win32.Renos.vbmz [Kaspersky Lab] | 4 |
| Packer.Malware.Lighty [Ikarus] | 4 |
| Packer.Malware.Lighty.F [Ikarus] | 4 |
| TROJ_DLOADR.RS [Trend Micro] | 4 |
| TROJ_RENOS.AHO [Trend Micro] | 4 |
| Trojan.Dropper [Symantec] | 4 |
| Trojan.Win32.Agent.acab [Kaspersky Lab] | 4 |
| Trojan.Win32.Agent.anxj [Kaspersky Lab] | 4 |
| Trojan.Win32.Agent.apwo [Kaspersky Lab] | 4 |
| Trojan.Win32.Pakes [Ikarus] | 4 |
| Trojan.Win32.Pakes.lel [Kaspersky Lab] | 4 |
| Trojan.Win32.Pakes.lgf [Kaspersky Lab] | 4 |
| Trojan.Win32.Pakes.lnh [Kaspersky Lab] | 4 |
| Trojan:Win32/Zbot.AY [Microsoft] | 4 |
| Trojan-Clicker.Win32.Delf.aym [Ikarus] | 4 |
| Trojan-Downloader.Agent.OGP [PC Tools] | 4 |
| Trojan-Downloader.Win32.Agent.ajiw [Kaspersky Lab] | 4 |