The file-infector class is also used to refer to programs that do not physically attach to files but associate themselves with program filesnames. Master Boot Record Infectors - Infects the system's Master Boot Record on hard drives and the Boot Sector on floppy diskettes. A Boot Sector virus is loaded into memory upon boot-up, before virus detection code can be executed. Macro Virus - Some computer applications contain macro languages to help automate tedious tasks. As computers have grown more powerful, the tasks have become more complex.
Some macro languages offer the ability to write files other than the original document.
MDMA Sat Bug. Encryption - Encryption is a change made to data, code or a file so that it can no longer read or accessed without processing. Virus' may use encryption in order to hinder detection by hiding their viral code. Memory Resident - A program that stays in the active RAM of the computer while other programs are running. Payload - Describes code within a virus that is not part of detection avoidance.