slot2 Amazon Linux 2023 UEFI Bootkit

slot2 is a two-stage UEFI GRUB2 bootkit designed to establish a persistent pre-OS implant on Amazon Linux 2023 x8664 EC2 instances. It installs a custom GRUB EFI image and Unified Kernel Image, creates a UEFI NVRAM boot entry ahead of the stock Amazon entry, executes an implant with network and...