| Threat Alias | Number of Incidents |
| Generic.dx [McAfee] | 33,151 |
| TROJ_AGENT.ACSF [Trend Micro] | 31,858 |
| BKDR_CIADOOR.EA [Trend Micro] | 30,456 |
| Trojan.DL.VB.AAVI [PC Tools] | 29,159 |
| Trojan.Win32.Agent.cmn [Kaspersky Lab] | 27,966 |
| Trojan-Downloader.Win32.VB.bsa [Kaspersky Lab] | 21,960 |
| Downloader.gen.a [McAfee] | 18,289 |
| Trojan.Agent!sd5 [PC Tools] | 2,745 |
| IRC/Flood.gen.e [McAfee] | 1,022 |
| not-a-virus:Client-IRC.Win32.mIRC.601 [Kaspersky Lab] | 1,008 |
| Trojan.Zapchast [PC Tools] | 938 |
| BKDR_ZAPCHAST.AX [Trend Micro] | 910 |
| Backdoor.Trojan [Symantec] | 826 |
| IRC.Backdoor.Trojan [Symantec] | 810 |
| TROJ_DLOADER.FXN [Trend Micro] | 810 |
| Downloader-BJM [McAfee] | 769 |
| Troj/Agent-GGQ [Sophos] | 769 |
| Troj/Mirchack-A [Sophos] | 658 |
| Trojan:Win32/Zapchast [Microsoft] | 658 |
| TROJ_VB.CEO [Trend Micro] | 649 |
| TrojanDownloader:Win32/VB [Microsoft] | 645 |
| not-a-virus:Client-IRC.Win32.mIRC [Ikarus] | 547 |
| Virus.Win32.VB.FXE [Ikarus] | 526 |
| Generic BackDoor.f [McAfee] | 412 |
| Backdoor:Win32/Rbot [Microsoft] | 403 |
| Troj/Agent-GFL [Sophos] | 394 |
| Worm.Ircbot [Ikarus] | 361 |
| Win-Trojan/Xema.variant [AhnLab] | 324 |
| Backdoor.IRC!sd5 [PC Tools] | 299 |
| Trojan-Downloader.Win32.VB.dck [Kaspersky Lab] | 276 |
| Win-Trojan/IRCHack.593262 [AhnLab] | 266 |
| W32/Zipwire-A [Sophos] | 264 |
| Backdoor.IRC!sd6 [PC Tools] | 258 |
| W32/Sdbot.worm [McAfee] | 252 |
| VBS/Ircbot [AhnLab] | 247 |
| Generic PUP.x [McAfee] | 227 |
| not-a-virus:Client-IRC.Win32.mIRC.603 [Kaspersky Lab] | 226 |
| Trojan.Win32.Agent [Ikarus] | 222 |
| TrojanDownloader:Win32/Tonick.gen [Microsoft] | 214 |
| Worm.Pizbot.A [PC Tools] | 201 |
| Trojan-Spy.Win32.Banbra [Ikarus] | 180 |
| Win-Trojan/Agent.839705 [AhnLab] | 174 |
| Trojan-Downloader.VB!sd6 [PC Tools] | 140 |
| Mal/EncPk-DV [Sophos] | 135 |
| Win32/IRCBot.worm.variant [AhnLab] | 127 |
| TrojanDownloader:Win32/VB.BK [Microsoft] | 124 |
| Worm.Rbot.ABCC [PC Tools] | 104 |
| Backdoor.Win32.IRCBot.jvw [Kaspersky Lab] | 99 |
| BackDoor-DVR [McAfee] | 89 |
| Troj/IRCBot-AET [Sophos] | 83 |
| Backdoor.IRC [PC Tools] | 80 |
| Trojan.Agent.DHWQ [PC Tools] | 80 |
| Mal/Generic-A [Sophos] | 73 |
| Backdoor:Win32/Agent [Microsoft] | 65 |
| Mal/Bckdr-C, Mal/Inject-M [Sophos] | 57 |
| Backdoor.Win32.IRCBot [Ikarus] | 56 |
| Worm:Win32/Pizbot.gen [Microsoft] | 50 |
| Mal/Inject-M [Sophos] | 41 |
| BKDR_AGENT.XQB [Trend Micro] | 35 |
| Generic BackDoor [McAfee] | 33 |
| not-a-virus:Client-IRC.Win32.mIRC.601 [Ikarus] | 28 |
| Troj/LdPinch-RT [Sophos] | 27 |
| Backdoor.IRC.Lamin [Ikarus] | 26 |
| VirTool:Win32/CeeInject.gen!R [Microsoft] | 25 |
| MultiDropper-RY [McAfee] | 24 |
| VirTool:Win32/VBInject.AB [Microsoft] | 23 |
| VirTool:Win32/DelfInject.gen!N [Microsoft] | 22 |
| Backdoor.Win32.Poison.wtd [Kaspersky Lab] | 21 |
| Trojan.Buzus.KG [PC Tools] | 21 |
| W32/Nirbot.worm [McAfee] | 19 |
| Win-Trojan/Poison.139264.C [AhnLab] | 19 |
| W32/Spybot.worm.gen [McAfee] | 18 |
| W32/Spybot.worm.gen.a [McAfee] | 18 |
| VirTool.Win32.CeeInject [Ikarus] | 17 |
| Virus.Win32.Injector [Ikarus] | 17 |
| Backdoor.Win32.Poison [Ikarus] | 16 |
| BackDoor-DKI.gen.aj [McAfee] | 16 |
| Troj/Poison-BN [Sophos] | 16 |
| Backdoor.IRCBot!sd5 [PC Tools] | 15 |
| Backdoor.Win32.IRCBot.cta [Kaspersky Lab] | 14 |
| VirTool:Win32/CeeInject.gen!J [Microsoft] | 14 |
| Worm.DR.Delf.AHJT [PC Tools] | 12 |
| Backdoor:Win32/IRCbot.AN [Microsoft] | 11 |
| Backdoor.Win32.Bifrose.aer [Kaspersky Lab] | 10 |
| Backdoor.Win32.ForBot.am [Kaspersky Lab] | 10 |
| Trojan-Downloader.VB!ct [PC Tools] | 10 |
| Virus.Win32.Buzus [Ikarus] | 10 |
| W32/IRCbot.gen.a [McAfee] | 10 |
| WORM_SDBOT.GAV [Trend Micro] | 10 |
| Backdoor.VanBot!sd6 [PC Tools] | 9 |
| Backdoor.Win32.Bifrose.fms [Kaspersky Lab] | 9 |
| Backdoor.Win32.mIRC-based.k [Kaspersky Lab] | 9 |
| Backdoor.Win32.VanBot.wv [Kaspersky Lab] | 9 |
| Backdoor.Win32.VanBot.xd [Kaspersky Lab] | 9 |
| Backdoor:Win32/IRCbot.AF [Microsoft] | 9 |
| Troj/Bckdr-QPX [Sophos] | 9 |
| Trojan:Win32/Ircbrute [Microsoft] | 9 |
| Trojan-Downloader.Win32.Agent.bl [Kaspersky Lab] | 9 |
| TrojanDropper:Win32/VBInject.C [Microsoft] | 9 |
| BackDoor-DVR.gen.a [McAfee] | 8 |