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 techniques to hide their presence from antivirus tools (such as intercepting system calls), but stealth is a behavioral characteristic, not a classification that defines MBR infection capability.

Multipartite viruses are hybrid threats that infect both the boot sector/MBR and executable files simultaneously, making them capable of MBR infection as part of their multi-vector attack strategy.

Boot sector viruses directly target the MBR or volume boot record, overwriting or appending malicious code to the sector that is executed first during system startup, which is precisely the MBR's role.

File viruses infect executable files (such as .exe or .com files) by attaching their code to those files, and they do not target the MBR or boot sectors.