Rootkit
A program or collection of software tools programmed to hide certain objects or activity in the system. As a rule, cybercriminals hide the registry keys for the autorun of malicious objects, as well as files, folders, processes in the infected computer’s memory, and malicious network activity. They can hinder the deletion of files or registry keys. Rootkits themselves do not cause direct harm to the computer. In the overwhelming majority of cases, they are used in conjunction with other malware to prevent detection and maximize the stay time on the victim computer.
Bootkit
A bootkit is a malicious program designed to load as early as possible in the boot process, in order to control all stages of the operating system start up, modifying system code and drivers before anti-virus and other security components are loaded. The malicious program is loaded from the Master Boot Record (MBR) or boot sector. In effect, a bootkit is a rootkit that loads before the operating system.
MBR (Master Boot Record)=The MBR is the first sector on a hard disk and contains the partition table, which holds information on the number of partitions, their size and which one is active (i.e. which one contains the operating system used to boot the machine).
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