Some viruses will attempt to tunnel under anti-virus monitoring programs in order to bypass their monitoring functions.
Some anti-virus programs also use tunneling techniques to bypass any viruses that might be active in memory when they load.
- A tunneling virus attempts to bypass activity monitor anti-virus programs by following the interrupt chain back down to the basic DOS or BIOS interrupt handlers and then installing itself.
|How Viruses Infect|
|Spacefiller (Cavity) Viruses||Camouflage Viruses|