| Threat Alias | Number of Incidents |
| Mal/Zapchas-C [Sophos] | 141 |
| Backdoor.IRC.Zapchast.zwrc [Kaspersky Lab] | 128 |
| Backdoor.IRC.Zapchast [Ikarus] | 109 |
| mIRC/Zapchast [AhnLab] | 31 |
| Backdoor:IRC/Zcrew.gen [Microsoft] | 23 |
| Backdoor.IRC.Aladinz [Symantec] | 12 |
| Backdoor.IRC.Zapchast [PC Tools] | 12 |
| Backdoor.IRC.Zapchast [Kaspersky Lab] | 9 |
| Backdoor.IRC.Kelebek.ak [Ikarus] | 6 |
| IRC Trojan [Symantec] | 6 |
| Backdoor.IRC.Cloner [Ikarus] | 4 |
| Backdoor:IRC/IRCFlood [Microsoft] | 4 |
| mIRC/Kelebek [AhnLab] | 4 |
| mIRC/Xema [AhnLab] | 4 |
| Backdoor.IRC.Kelebek.ak [Kaspersky Lab] | 3 |
| Backdoor.IRC.Zapchast.h [Kaspersky Lab] | 3 |
| Backdoor.IRC.Zcrew [Ikarus] | 3 |
| Troj/Zapchas-EJ [Sophos] | 3 |
| Troj/Zapchas-AX [Sophos] | 2 |
| Backdoor.IRC.Kelebek.ab [Kaspersky Lab] | 1 |
| Backdoor:IRC/Flood.CE [Microsoft] | 1 |
| Hacktool.HideWindow [PC Tools] | 1 |
| Hacktool.HideWindow [Symantec] | 1 |
| mIRC/Ircflood [AhnLab] | 1 |