Pre-OS Boot: Component Firmware

Created the Wednesday 15 February 2023. Updated 1 year, 2 months ago.

Adversaries may modify component firmware to persist on systems. Some adversaries may employ sophisticated means to compromise computer components and install malicious firmware that will execute adversary code outside of the operating system and main system firmware or BIOS. This technique may be similar to System Firmware but conducted upon other system components/devices that may not have the same capability or level of integrity checking.

Malicious component firmware could provide both a persistent level of access to systems despite potential typical failures to maintain access and hard disk re-images, as well as a way to evade host software-based defenses and integrity checks.

Technique Identifier

T1542.002

Technique Tags

Persistence Defense Evasion modify component firmware execute adversary code patching legitimate device firmware overwrite firmware

Additional Resources

External Links

The resources provided below are associated links that will give you even more detailed information and research on current evasion technique. It is important to note that, while these resources may be helpful, it is important to exercise caution when following external links. As always, be careful when clicking on links from unknown sources, as they may lead to malicious content.

Pre-OS Boot: Component Firmware, Sub-technique T1542.002 - Enterprise | MITRE ATT&CK®