CAPEC-532 詳細

An attacker with access to download and update system software sends a maliciously altered BIOS to the victim or victim supplier/integrator, which when installed allows for future exploitation.

前提条件

Advanced knowledge about the installed target system design.
Advanced knowledge about the download and update installation processes.
Access to the download and update system(s) used to deliver BIOS images.

必要なスキル

Able to develop a malicious BIOS image with the original functionality as a normal BIOS image, but with added functionality that allows for later compromise and/or disruption.

緩和策

Deploy strong code integrity policies to allow only authorized apps to run.
Use endpoint detection and response solutions that can automaticalkly detect and remediate suspicious activities.
Maintain a highly secure build and update infrastructure by immediately applying security patches for OS and software, implementing mandatory integrity controls to ensure only trusted tools run, and requiring multi-factor authentication for admins.
Require SSL for update channels and implement certificate transparency based verification.
Sign update packages and BIOS patches.
Use hardware security modules/trusted platform modules to verify authenticity using hardware-based cryptography.

参考文献

REF-439

Supply Chain Attack Framework and Attack Patterns
John F. Miller.
http://www.mitre.org/sites/default/files/publications/supply-chain-attack-framework-14-0228.pdf

REF-716

Supply chain attacks
Daniel Simpson, Dani Halfin, Andrews Mariano Gorzelany, Beth Woodbury.
https://docs.microsoft.com/en-us/windows/security/threat-protection/intelligence/supply-chain-malware

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