| 2004-07-27 | Macro.Word97.Cryptor |
| 2004-07-27 | Win32.Crypto |
| 2004-07-27 | Crypt.134 |
| 2004-07-27 | Cruel |
| 2004-07-27 | Crude.936 |
| 2004-07-27 | Macro.Word97.Crud |
| 2004-07-27 | Croatia_II.560 |
| 2004-07-27 | Critter.1015 |
| 2004-07-27 | Backdoor.IRC.Critical |
| 2004-07-27 | Cripple.403 |
| 2004-07-27 | CriminalWW (rodzina) |
| 2004-07-27 | CriCri.4616 |
| 2004-07-27 | Crew (rodzina) |
| 2004-07-27 | Macro.Word.Crema |
| 2004-07-27 | Creeper.569 |
| 2004-07-27 | CrazyPunk.500 |
| 2004-07-27 | CrazyPriest.1416 |
| 2004-07-27 | CrazyEddie |
| 2004-07-27 | CrazyBytes.1418 |
| 2004-07-27 | CrazyBoot |
| 2004-07-27 | Trojan.PSW.CrazyBilets |
| 2004-07-27 | Email-Worm.Win32.Creepy |
| 2004-07-27 | Crawly.6624 |
| 2004-07-27 | Crawler (rodzina) |
| 2004-07-27 | Crasher (rodzina) |
| 2004-07-27 | Crash (rodzina) |
| 2004-07-27 | Cracky (rodzina) |
| 2004-07-27 | Crackers |
| 2004-07-27 | IRC-Worm.Crack |
| 2004-07-27 | Macro.Word.Counter |
| 2004-07-27 | Costeau.512 |
| 2004-07-27 | Email-Worm.Win32.Cosol |
| 2004-07-27 | Corrupt.1033 |
| 2004-07-27 | Email-Worm.Win32.Coronex |
| 2004-07-27 | Macro.Office.Corner |
| 2004-07-27 | Cordobes (rodzina) |