| 2004-07-27 | Athens (rodzina) |
| 2004-07-27 | Atenfor.2515 |
| 2004-07-27 | Win32.Atav |
| 2004-07-27 | Asterisk |
| 2004-07-27 | Assassin.4834 |
| 2004-07-27 | Ass.476 |
| 2004-07-27 | Asp (rodzina) |
| 2004-07-27 | Win32.Asorl |
| 2004-07-27 | Macro.Word.Asli |
| 2004-07-27 | Arusiek.817 |
| 2004-07-27 | Win32.Artelad |
| 2004-07-27 | Armagedon (rodzina) |
| 2004-07-27 | Macro.Word.Armadillon |
| 2004-07-27 | Win95.Arianne |
| 2004-07-27 | Macro.Word97.Argh |
| 2004-07-27 | Areopag.480 |
| 2004-07-27 | Areg (rodzina) |
| 2004-07-27 | Arcs.1194 |
| 2004-07-27 | Macro.Word.Archie |
| 2004-07-27 | Macro.Word.Archfiend |
| 2004-07-27 | Win32.Arcer |
| 2004-07-27 | Aragorn.1522 |
| 2004-07-27 | April.748 |
| 2004-07-27 | April4.751 |
| 2004-07-27 | April30.419 |
| 2004-07-27 | April |
| 2004-07-27 | Exploit.Applet.ActiveXComponent |
| 2004-07-27 | Appelscha.2161 |
| 2004-07-27 | Macro.Word.Appder |
| 2004-07-27 | Email-Worm.Win32.Apost |
| 2004-07-27 | Win95.Apop |
| 2004-07-27 | Macro.Word97.Apmrs |
| 2004-07-27 | Worm.Win32.Apart |
| 2004-07-27 | Apadana.1500 |
| 2004-07-27 | Ap.272 |
| 2004-07-27 | Macro.Word97.Aos |