The citations in the article don't talk about secure boot at all. Windows 8 is perfectly able to boot from BIOS or UEFI without secure boot, and given that the

The citations in the article don't talk about secure boot at all. Windows 8 is perfectly able to boot from BIOS or UEFI without secure boot, and given that the context is a bootkit that works on Windows 2000 to Windows 8 it's entirely possible that it doesn't have anything to do with secure boot.