For those who need Evil Maid skills take note: Joe Fitzpatrick has added a BIOS mod lab to his Black Hat training on x86 physical attacks.
Applied Physical Attacks on x86 Systems
Joe FitzPatrick, SecuringHardware.com
July 30-August 2
This course introduces and explores attacks on several different relatively accessible interfaces on x86 systems. Attendees will get hands-on experience implementing and deploying a number of low-cost hardware devices to enable access, privilege, and deception which is in some cases imperceptible from software. The course has several modules: USB, SPI/BIOS, I2C/SMBus, PCIe, and JTAG. Each begins with an architectural overview of an interface, and follows with a series of labs for hands-on practice understanding, observing, interacting with, and exploiting the interface, finishing with either potentially exploitable crashes or directly to root shells.
https://www.blackhat.com/us-16/training/applied-physical-attacks-on-x86-systems.html
Firmware Security 