| Threat Alias | Number of Incidents |
| Win32/IRCBot.worm.Gen [AhnLab] | 29 |
| Generic QHosts.a.gen [McAfee] | 16 |
| Trojan.QHosts.G [PC Tools] | 16 |
| Virus.Win32.IRCBot [Ikarus] | 13 |
| Trojan.Win32.Qhost.cm [Kaspersky Lab] | 11 |
| Mal/IRCBot-B [Sophos] | 8 |
| Backdoor.Win32.IRCBot.gen [Kaspersky Lab] | 7 |
| Mal/IRCBot-B, Mal/Behav-150 [Sophos] | 7 |
| New Malware.b [McAfee] | 7 |
| Trojan:Win32/Qhost.gen!D [Microsoft] | 7 |
| W32/Generic.b.worm [McAfee] | 7 |
| Trojan:Win32/Malex.gen!F [Microsoft] | 6 |
| Virus.Win32.IRCBot.BSX [Ikarus] | 6 |
| Worm:Win32/Pushbot.gen [Microsoft] | 6 |
| Backdoor.Win32.IRCBot [Ikarus] | 5 |
| Exploit-DcomRpc.gen [McAfee] | 5 |
| HeurEngine.Skintrim [PC Tools] | 5 |
| Mal/SkimTrim-A [Sophos] | 5 |
| Worm:Win32/Pushbot.gen!C [Microsoft] | 5 |
| Backdoor:Win32/IRCbot.gen!K [Microsoft] | 4 |
| WORM_RBOT.GEN [Trend Micro] | 4 |
| Generic Dropper.cx [McAfee] | 3 |
| Generic.dx [McAfee] | 3 |
| Mal/EncPk-HW [Sophos] | 3 |
| New Malware.ai [McAfee] | 3 |
| AdWare.NaviPromo [Ikarus] | 2 |
| Trojan.Win32.Hrup.gen [Kaspersky Lab] | 2 |
| Trojan:Win32/Skintrim.gen!D [Microsoft] | 2 |
| Trojan:Win32/Skintrim.H [Microsoft] | 2 |
| TrojanDownloader:Win32/Small.gen!C [Microsoft] | 2 |
| AdWare.NaviPromo.Gen.1 [Ikarus] | 1 |
| Backdoor.Win32.Bifrose.baox [Kaspersky Lab] | 1 |
| Mal/Behav-010, Mal/IRCBot-B, Mal/Behav-027 [Sophos] | 1 |
| Mal/Behav-010, Mal/SillyFDC-A [Sophos] | 1 |
| Mal/Generic-A [Sophos] | 1 |
| Mal/Generic-E [Sophos] | 1 |
| Mal/SillyFDC-A [Sophos] | 1 |
| Mal/SillyFDC-A, Mal/IRCBot-B [Sophos] | 1 |
| Mal/SillyFDC-A, Mal/IRCBot-B, Mal/Emogen-Y [Sophos] | 1 |
| Packed.Win32.Black [Ikarus] | 1 |
| Packed.Win32.Black.a [Kaspersky Lab] | 1 |
| Skintrim.gen.f [McAfee] | 1 |
| Trojan.Win32.Antavmu.gby [Kaspersky Lab] | 1 |
| Trojan.Win32.Hrup [Ikarus] | 1 |
| Trojan:Win32/Skintrim.gen!B [Microsoft] | 1 |
| TrojanDownloader:Win32/Maldldr.gen!A [Microsoft] | 1 |
| TrojanDropper:Win32/Hostil.B [Microsoft] | 1 |
| W32/Checkout!a [McAfee] | 1 |
| Worm:Win32/Pushbot.MH [Microsoft] | 1 |