| K2PS.EXE Trojan | Category 1 | | 05-12-1999 |
| Kak.Worm.B Fix | - | | - |
| Kampana | Category 2 | | - |
| Kaos4.697 | Category 1 | | - |
| Karnivali.1971 | - | | 05-13-1996 |
| Kazaap | - | | - |
| Kazcor.4444 | - | | - |
| KC.1238 | Category 1 | | 03-28-2001 |
| Kerbcrack | - | | - |
| Keylogger.Cone.Trojan | Category 1 | | 07-09-2003 |
| Keylogger.Mose | Category 1 | | 04-02-2006 |
| Keylogger.Stawin | Category 1 | | 01-29-2004 |
| KeyPanic.Trojan | Category 1 | | 11-29-2000 |
| Keypress.1232.A | Category 1 | | - |
| KidControl | - | | - |
| Kill98.Trojan | Category 1 | | 12-31-1999 |
| KillMBR.g | Category 2 | | 08-02-2001 |
| KIX.Ixlam.A | Category 1 | | 10-31-2005 |
| Kleneu66 Hoax | - | | 09-19-2003 |
| KLF | Category 1 | | 07-15-1996 |
| Kondrik@mm | Category 1 | | 12-02-2002 |
| KSMH.3968 | Category 1 | | 10-04-1997 |
| KvmSecure | - | | - |