Please note that these pages include descriptions of only a fraction of all the malware F-Prot Antivirus detects. F-Prot Antivirus now detects a total of 1127783 worms, viruses and other malicious programs, with dozens of new threats added every week.
| Name of Virus | Date Discovered |
| JS/Kak | 30 Dec 1999 |
| W32/Kapser.A@mm | 16 Jan 2006 |
| W32/Kelvir.A | 6 Mar 2005 |
| W32/Kelvir.AA | 9 May 2005 |
| W32/Kelvir.AB | 9 May 2005 |
| W32/Kelvir.AC | 9 May 2005 |
| W32/Kelvir.B | 7 Mar 2005 |
| W32/Kelvir.C | 7 Mar 2005 |
| W32/Kelvir.D | 7 Mar 2005 |
| W32/Kelvir.E | 13 Mar 2005 |
| W32/Kelvir.F | 31 Mar 2005 |
| W32/Kelvir.G | 7 Apr 2005 |
| W32/Kelvir.H | 14 Apr 2005 |
| W32/Kelvir.I | 14 Apr 2005 |
| W32/Kelvir.J | 14 Apr 2005 |
| W32/Kelvir.K | 15 Apr 2005 |
| W32/Kelvir.L | 18 Apr 2005 |
| W32/Kelvir.M | 18 Apr 2005 |
| W32/Kelvir.N | 18 Apr 2005 |
| W32/Kelvir.O | 18 Apr 2005 |
| W32/Kelvir.P | 19 Apr 2005 |
| W32/Kelvir.Q | 20 Apr 2005 |
| W32/Kelvir.R | 20 Apr 2005 |
| W32/Kelvir.S | 20 Apr 2005 |
| W32/Kelvir.T | 26 Apr 2005 |
| W32/Kelvir.U | 26 Apr 2005 |
| W32/Kelvir.V | 28 Apr 2005 |
| W32/Kelvir.W | 2 May 2005 |
| W32/Kelvir.X | 2 May 2005 |
| W32/Kelvir.Y | 5 May 2005 |
| W32/Kelvir.Z | 9 May 2005 |
| W32/KilOnce | 27 Nov 2002 |
| W32/Klez.H@mm | 17 Apr 2002 |
| W32/Korgo.A | 22 May 2004 |
| W32/Korgo.AA | 23 Sep 2004 |
| W32/Korgo.AB | 14 Oct 2004 |
| W32/Korgo.AD | 2 Nov 2004 |
| W32/Korgo.AE | 2 Nov 2004 |
| W32/Korgo.B | 24 May 2004 |
| W32/Korgo.C | 26 May 2004 |
| W32/Korgo.D | 30 May 2004 |
| W32/Korgo.E | 1 Jun 2004 |
| W32/Korgo.F | 1 Jun 2004 |
| W32/Korgo.G | 2 Jun 2004 |
| W32/Korgo.H | 8 Jun 2004 |
| W32/Korgo.I | 8 Jun 2004 |
| W32/Korgo.J | 9 Jun 2004 |
| W32/Korgo.K | 9 Jun 2004 |
| W32/Korgo.L | 9 Jun 2004 |
| W32/Korgo.M | 9 Jun 2004 |
| W32/Korgo.N | 9 Jun 2004 |
| W32/Korgo.O | 9 Jun 2004 |
| W32/Korgo.P | 19 Jun 2004 |
| W32/Korgo.Q | 20 Jun 2004 |
| W32/Korgo.R | 22 Jun 2004 |
| W32/Korgo.S | 23 Jun 2004 |
| W32/Korgo.T | 25 Jun 2004 |
| W32/Korgo.U | 25 Jun 2004 |
| W32/Korgo.V | 1 Jul 2004 |
| W32/Korgo.W | 17 Jul 2004 |