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Training Camp • Cybersecurity Glossary
A bootkit infects UEFI firmware or the boot loader to run before the OS, enabling stealthy persistence that Secure Boot and firmware integrity help counter.
Bootkit Definition: A bootkit infects UEFI firmware or the boot loader to run before the OS, enabling stealthy persistence that Secure Boot and firmware integrity help counter.
A bootkit is a form of malware that infects the early boot process, such as the UEFI firmware, master boot record, or boot loader, so it executes before the operating system and any security controls load. By gaining control this early, bootkits achieve deep persistence and stealth, surviving OS reinstalls and evading many defenses; UEFI bootkits like BlackLotus illustrate the threat and the value of Secure Boot and firmware integrity verification.
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