| Threat Alias | Number of Incidents |
| Reg/IRCSpoolsv [McAfee] | 25,917 |
| Backdoor.IRC.Zapchast.zwrc [Kaspersky Lab] | 21,353 |
| Backdoor.IRC.Zapchast [Ikarus] | 19,397 |
| Trojan.RunKeys [PC Tools] | 18,908 |
| IRC.Backdoor.Trojan [Symantec] | 18,582 |
| REG/Zapchast [AhnLab] | 5,216 |
| Backdoor.Zapchast [Ikarus] | 3,097 |
|