UEFI flaws can be exploited to install highly persistent ransomware | CSO Online
Over the past few years, the world has seen ransomware threats advance from living inside browsers to operating systems, to the bootloader, and now to the low-level firmware that powers a computer’s hardware components.Earlier this year, a team of researchers from security vendor Cylance demonstrated a proof-of-concept ransomware program that ran inside a motherboard’s Unified Extensible Firmware Interface (UEFI) — the modern BIOS.On Friday, at the Black Hat Asia security conference, the team revealed how they did it: by exploiting vulnerabilities in the firmware of two models of ultra compact PCs from Taiwanese computer manufacturer Gigabyte Technology.The two vulnerabilities affect the GB-BSi7H-6500 and GB-BXi7-5775 models of Gigabyte’s Mini-PC Barebone (BRIX) platform. They allow an attacker with access to the OS to elevate their privileges and execute malicious code in System Management Mode (SMM), a special operating mode of the CPU that allows executing low-level software.
Källa: UEFI flaws can be exploited to install highly persistent ransomware | CSO Online
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