Hide Navigation Hide TOC Bootloader Authentication (a534994d-125d-549d-bbd5-20f31a2eee6c) Cryptographically authenticating the bootloader software before system boot. Cluster A Galaxy A Cluster B Galaxy B Level Bootkit - T1542.003 (1b7b1806-7746-41a1-a35d-e48dae25ddba) Attack Pattern Bootloader Authentication (a534994d-125d-549d-bbd5-20f31a2eee6c) MITRE D3FEND 1 Bootkit - T1542.003 (1b7b1806-7746-41a1-a35d-e48dae25ddba) Attack Pattern Pre-OS Boot - T1542 (7f0ca133-88c4-40c6-a62f-b3083a7fbc2e) Attack Pattern 2