olemus
nakatatud programmi tihendav viirus

näiteid
- Cruncher
http://vxheaven.0l.wtf/lib/aek07.html
- HybrisF
http://www.macutility.com/Virus/remove-HybrisF-20456.html
- Aldebera
https://macutility.com/Virus/remove-W32.Aldebara-34528.html
- Redemption
http://www.spy-emergency.com/research/V/Virus.Win32.Redemption.html