| Threat Alias | Number of Incidents |
| Downloader [Symantec] | 30 |
| Trojan.Win32.Qhost [Ikarus] | 24 |
| Trojan.Win32.Qhost.mlv [Kaspersky Lab] | 23 |
| Downloader.gen.a [McAfee] | 21 |
| Win-Trojan/Qhost.2048 [AhnLab] | 21 |
| Generic Qhost!y [McAfee] | 20 |
| Mal/Generic-A [Sophos] | 19 |
| Downloader-BAC [McAfee] | 17 |
| TROJ_DLOADER.BG [Trend Micro] | 16 |
| TROJ_DLOADER.CO [Trend Micro] | 16 |
| Trojan.SpamThru [Symantec] | 16 |
| Trojan-Downloader.Win32.Small.hko [Kaspersky Lab] | 16 |
| TROJ_SPAMBOT.B [Trend Micro] | 14 |
| Trojan:Win32/Koobface.B [Microsoft] | 14 |
| Backdoor.Win32.Agent.adr [Kaspersky Lab] | 11 |
| TROJ_DLOADER.WTG [Trend Micro] | 6 |
| Trojan-Downloader.Win32.Small.ddx [Kaspersky Lab] | 6 |
| Trojan-Downloader.Win32.Small.fyx [Kaspersky Lab] | 6 |
| TROJ_SMALL.BKJ [Trend Micro] | 4 |
| TROJ_SMALL.IRN [Trend Micro] | 4 |
| Trojan.PWS.QQPass [Symantec] | 4 |
| Trojan-Downloader.Win32.Small.gdy [Kaspersky Lab] | 4 |
| Trojan.Peacomm [Symantec] | 3 |
| Backdoor.Trojan [Symantec] | 2 |
| Generic.dx [McAfee] | 2 |
| Mal/Behav-316 [Sophos] | 2 |
| Mal/SpamThru-A, Troj/SpamTh-Gen [Sophos] | 2 |
| Spy-Agent.dy [McAfee] | 2 |
| TROJ_DLOADER.QIV [Trend Micro] | 2 |
| TROJ_DLOADER.STI [Trend Micro] | 2 |
| TROJ_DLOADER.WTI [Trend Micro] | 2 |
| Trojan.Win32.Qhost.aru [Kaspersky Lab] | 2 |
| Trojan:Win32/SpamThru.gen!dll [Microsoft] | 2 |
| Trojan-Downloader.Win32.Small.hcm [Kaspersky Lab] | 2 |
| Backdoor.Win32.Agent.ail [Kaspersky Lab] | 1 |
| Backdoor.Win32.Agent.uu [Kaspersky Lab] | 1 |
| Backdoor.Win32.Bredavi.azn [Kaspersky Lab] | 1 |
| Dropper/Xema.67584.H [AhnLab] | 1 |
| Generic BackDoor.m [McAfee] | 1 |
| Generic Downloader [McAfee] | 1 |
| Generic Downloader.z [McAfee] | 1 |
| Infostealer [Symantec] | 1 |
| Packed.Win32.TDSS.z [Kaspersky Lab] | 1 |
| TROJ_DLOADER.DUF [Trend Micro] | 1 |
| TROJ_Generic [Trend Micro] | 1 |
| TROJ_SMALL.IRO [Trend Micro] | 1 |
| TROJ_SMALL.IZU [Trend Micro] | 1 |
| Trojan.Adclicker [Symantec] | 1 |
| Trojan.Generic [Ikarus] | 1 |
| Trojan.Win32.Qhost.it [Kaspersky Lab] | 1 |
| Trojan-Downloader.Win32.Bensorty.r [Kaspersky Lab] | 1 |
| TSPY_AGENT.IRZ [Trend Micro] | 1 |
| Virus.Win32.Virut.ce [Kaspersky Lab] | 1 |
| Win-Trojan/Agent.184864 [AhnLab] | 1 |
| Win-Trojan/Agent.184864.B [AhnLab] | 1 |