What is a tunnelling virus?
A TUNNELLING VIRUS is one that finds the original interrupt handlers in DOS and the BIOS and calls them directly, thus bypassing any activity monitoring program (see D1) which may be loaded and have intercepted the respective interrupt vectors in its attempt to detect viral activity. Some antivirus software also uses tunnelling techniques in an attempt to bypass any unknown or undetected virus that may be active when it runs.
A TUNNELLING VIRUS is one that finds the original interrupt handlers in DOS and the BIOS and calls them directly, thus bypassing any activity monitoring program which may be loaded and have intercepted the respective interrupt vectors in its attempt to detect viral activity. Some antivirus software also uses tunnelling techniques in an attempt to bypass any unknown or undetected virus that may be active when it runs.
