The MBR of a hard disk is a collection of boot records that contain disk information such as disk architecture, cluster size, and so on. The main work of the MBR is to locate and run necessary…

Stealth viruses use interception techniques to hide their presence from OS and antivirus scans but are not defined by targeting the MBR specifically.

Boot sector viruses directly overwrite or append malicious code into the Master Boot Record or volume boot record, executing before the OS loads, making MBR infection their primary and defining attack vector.

Multipartite viruses are hybrid threats capable of infecting both the MBR/boot sector and executable files, meaning they can compromise the MBR as part of their multi-vector infection strategy.

File viruses infect executable files such as .EXE or .COM files and do not target the MBR or the boot sector.