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BIOS and Secure Boot Attacks Uncovered

By Nytro, in Tutoriale in engleza

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BIOS and Secure Boot Attacks Uncovered

Andrew Furtak, Yuriy Bulygin, Oleksandr Bazhaniuk, John Loucaides, Alexander Matrosov, Mikhail Gorobets

Signed BIOS Updates Are Rare

Mebromimalware includes BIOS infector & MBR bootkitcomponents

•Patches BIOS ROM binary injecting malicious ISA Option ROM with legitimate BIOS image mod utility

•Triggers SW SMI 0x29/0x2F to erase SPI flash then write patched BIOS binary

No Signature Checks of OS boot loaders (MBR)

•No concept of Secure or Verified Boot

•Wonder why TDL4 and likes flourished?

Slides: http://www.c7zero.info/stuff/BIOSandSecureBootAttacksUncovered_eko10.pdf

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