| Family | Has Image | Versions |
|---|---|---|
| OD | 3 | |
| OGC | 1 | |
| OICQsearch | 9 | |
| OMPN | 4 | |
| Oblivion | 4 | |
| Octopus | 1 | |
| Odesa Downloader | 1 | |
| Odesa Msn Pass Stealer | 1 | |
| Ojo | 1 | |
| Olive | 2 | |
| Omega | 4 | |
| Omerta | 4 | |
| Ominous | 1 | |
| One | 1 | |
| Oneko | 1 | |
| One Of The Last Trojans | 2 | |
| Only1 | 1 | |
| Ontarget | 3 | |
| OpenTelnet | 1 | |
| Oper | 1 | |
| Optix | 21 | |
| Opul | 1 | |
| Opwin | 1 | |
| Oracle | 1 | |
| Orbit | 1 | |
| Orig | 1 | |
| Orion | 1 | |
| Orkus | 1 | |
| Orkut Keylogger | 2 | |
| Oscar | 1 | |
| Osiris | 7 | |
| Outbreak | 6 | |
| Over G Trojan | 1 | |
| Over-Ride | 1 | |
| OverDoz | 3 | |
| OverSpy | 2 | |
| Overload | 1 | |
| OwnedFTP | 1 | |
| Oxigen | 1 | |
| Oxon | 1 | |
| Oxygene Light | 2 | |
| osCagent | 1 |