| Threat Alias | Number of Incidents |
| W32/Sdbot.worm [McAfee] | 402 |
| Mal/Generic-A [Sophos] | 212 |
| Generic.dx [McAfee] | 169 |
| Backdoor.IRC.Flood [PC Tools] | 144 |
| not-a-virus:Client-IRC.Win32.mIRC.603 [Kaspersky Lab] | 144 |
| TROJ_BOTIRC.A [Trend Micro] | 144 |
| Win32/IRCBot.worm.variant [AhnLab] | 135 |
| Trojan.IRCBot [PC Tools] | 117 |
| Backdoor:Win32/IRCbot [Microsoft] | 114 |
| P2P-Worm.Win32.VB.dw [Kaspersky Lab] | 107 |
| W32.Alcra.F [Symantec] | 104 |
| Backdoor.IRCBot!sd6 [PC Tools] | 100 |
| Troj/Multidr-FT [Sophos] | 96 |
| Backdoor.IRCBot.DD [PC Tools] | 90 |
| W32/Generic.m [McAfee] | 88 |
| WORM_GAOBOT.DF [Trend Micro] | 88 |
| Backdoor.Win32.Rbot.gen [Kaspersky Lab] | 74 |
| W32/Virut.gen.a [McAfee] | 60 |
| Win-Trojan/MircPack.574464 [AhnLab] | 60 |
| Backdoor.Rbot [Ikarus] | 59 |
| WORM_SDBOT.GAV [Trend Micro] | 56 |
| W32/Virut.gen [McAfee] | 53 |
| Backdoor.Win32.IRCBot [Ikarus] | 50 |
| W32/Spybot.worm.gen [McAfee] | 50 |
| IRC-Worm.Win32.Tedeto.a [Ikarus] | 48 |
| P2P-Worm.Win32.Krepper.c [Kaspersky Lab] | 47 |
| Virus.Win32.Virut.n [Kaspersky Lab] | 43 |
| Worm.Akbot.Gen [PC Tools] | 43 |
| WORM_SHAREBOT.A [Trend Micro] | 43 |
| Win-Trojan/Xema.variant [AhnLab] | 41 |
| Worm.Rbot.ABCC [PC Tools] | 41 |
| Backdoor.Win32.SdBot.ts [Kaspersky Lab] | 36 |
| I-Worm.Maslan.C [PC Tools] | 36 |
| PE_MASLAN.C-O [Trend Micro] | 36 |
| W32/Maslan!irc [McAfee] | 36 |
| WORM_RBOT.GEN-1 [Trend Micro] | 36 |
| Backdoor:Win32/Poebot.gen [Microsoft] | 35 |
| Generic Downloader.s [McAfee] | 34 |
| Mal/Behav-285 [Sophos] | 34 |
| PE_VIRUT.AV [Trend Micro] | 34 |
| VirTool.Win32.CeeInject [Ikarus] | 34 |
| W32/Virut-W [Sophos] | 34 |
| VirTool.Win32.DelfInject [Ikarus] | 31 |
| Virus:Win32/Virut.AC [Microsoft] | 31 |
| Win32.Virut.Gen.4 [PC Tools] | 31 |
| Generic BackDoor [McAfee] | 30 |
| Trojan-Downloader.VB.AWJ [PC Tools] | 30 |
| W32/Sdbot.worm.gen.g [McAfee] | 30 |
| Virus.Win32.Virut.av [Kaspersky Lab] | 29 |
| Win32/Virut.B [AhnLab] | 28 |
| Worm.P2P.Krepper [PC Tools] | 26 |
| Backdoor.Win32.VanBot [Ikarus] | 25 |
| Backdoor:Win32/Rbot.gen [Microsoft] | 25 |
| Packed.Win32.Black.a [Kaspersky Lab] | 25 |
| VirTool:Win32/CeeInject.gen!J [Microsoft] | 23 |
| W32/IRCbot.gen.a [McAfee] | 22 |
| BackDoor-AWQ [McAfee] | 21 |
| VirTool:Win32/CeeInject.gen!A [Microsoft] | 21 |
| W32/Sdbot.worm.gen.h [McAfee] | 21 |
| W32/Vbbot [McAfee] | 21 |
| Worm.P2P.Krepper.B [PC Tools] | 21 |
| Worm.RBot.Gen.16 [PC Tools] | 21 |
| Worm:Win32/Hamweq.A [Microsoft] | 21 |
| Backdoor.IRCBot!sd5 [PC Tools] | 20 |
| Trojan-Downloader.Win32.VB.bgd [Kaspersky Lab] | 20 |
| Worm.PoeBot.KV [PC Tools] | 20 |
| Backdoor.Win32.IRCBot.bad [Kaspersky Lab] | 19 |
| Trojan.Win32.Buzus [Ikarus] | 19 |
| Trojan:Win32/Ircbrute [Microsoft] | 18 |
| W32/Vetor-A [Sophos] | 18 |
| Win32.Virut.Gen [PC Tools] | 18 |
| Backdoor.Win32.Mechbot.d [Kaspersky Lab] | 17 |
| Trojan-Dropper.Win32.Sramler.e [Kaspersky Lab] | 17 |
| W32/IRCbot.gen.f [McAfee] | 17 |
| W32/Sdbot.worm.gen.n [McAfee] | 17 |
| Worm:Win32/Spybot.CE [Microsoft] | 17 |
| Backdoor.Mechbot [PC Tools] | 16 |
| Backdoor.Win32.VanBot.dt [Kaspersky Lab] | 16 |
| BKDR_VANBOT.NM [Trend Micro] | 16 |
| not-a-virus.Keygen.Avast [Ikarus] | 16 |
| P2P-Worm.Win32.Palevo.nxs [Kaspersky Lab] | 16 |
| TROJ_DLOADER.PCR [Trend Micro] | 16 |
| Trojan.Sramler.I [PC Tools] | 16 |
| Trojan.Win32.Qhost.aei [Ikarus] | 16 |
| Virus.Win32.Trojan [Ikarus] | 16 |
| W32/Sdbot.worm.gen.ax [McAfee] | 16 |
| Worm.Alcra.F [PC Tools] | 16 |
| Worm.PoeBot.LC [PC Tools] | 16 |
| Worm.Win32.Hamweq [Ikarus] | 16 |
| Backdoor.Rbot!sd5 [PC Tools] | 15 |
| Backdoor.Win32.Rbot.bng [Kaspersky Lab] | 15 |
| PE_VIRUT.D [Trend Micro] | 15 |
| Backdoor:Win32/Sdbot [Microsoft] | 14 |
| PE_VIRUT.A [Trend Micro] | 14 |
| Trojan-PWS.Win32.Delf [Ikarus] | 14 |
| VirTool:Win32/DelfInject.gen!BE [Microsoft] | 14 |
| VirTool:Win32/Injector.gen!B [Microsoft] | 14 |
| W32/Bobax.worm.gen [McAfee] | 14 |
| W32/Virut.a [McAfee] | 14 |
| Win32/IRCBot.worm.Gen [AhnLab] | 14 |