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Brief Intro to (U)EFI 2
Brief Intro to (U)EFI: What is it? 3 - (Unified) Extensible Firmware Interface - modern industrial standard for x86 firmware - initially developed by Intel as BIOS replacement for IA64 - used by Macs since 2007, PCs since 2009 - performs HW initialization required to start an OS - modular and feature rich, uses well defined and known formats - mostly written in C, much easier to develop as legacy BIOS
Page 1 and 2: Fix it yourself detecting and fixin
Page 3: Agenda 1 - Brief Intro to (U)EFI -
Page 7 and 8: Brief Intro to (U)EFI: SEC concepts
Page 9 and 10: Brief Intro to (U)EFI: DXE concepts
Page 11 and 12: What an Attacker Can Do? 9
Page 13 and 14: What an Attacker Can Do: A quote 11
Page 15 and 16: Attack Vectors: SPI flash chip 13 -
Page 17 and 18: Attack Vectors: S3 BootScript 15 -
Page 19 and 20: Attack Vectors: BIOS Setup 17 - can
Page 21 and 22: Attack Vectors: Vendor-specific 19
Page 23 and 24: Protections: SPI flash 21 - read-on
Page 25 and 26: Protections: S3 BootScript 23 - the
Page 27 and 28: Protections: BIOS settings 25 - the
Page 29 and 30: An Average System 27
Page 31 and 32: Test Tools 29
Page 33 and 34: Test Tools: UEFITool 31 - open sour
Page 35 and 36: Test Results 33
Page 37 and 38: Test Results: UEFITool 35 - BIOS ha
Page 39 and 40: What Now? 37
Page 41 and 42: Prepare to Dig Deep 39
Page 43 and 44: Prepare to Dig Deep: POST card 41 -
Page 45 and 46: Prepare to Dig Deep: Quanta ZQX pin
Page 47 and 48: Prepare to Dig Deep: SPI emulator 4
Page 49 and 50: Fix It Yourself 47
Page 51 and 52: Fix It Yourself: EmuVariable driver
Page 53 and 54: Fix It Yourself: Set PR registers 5
Page 55 and 56:
Fix It Yourself: Decompile DSDT 53
Page 57 and 58:
Fix It Yourself: Patch S3 setup han
Page 59 and 60:
Fix It Yourself: PreventS3Pei drive
Page 61 and 62:
Fix It Yourself: Generate PK 59 - P
Page 63 and 64:
Fix It Yourself: Generate db 61 - d
Page 65 and 66:
Fix It Yourself: Enable SecureBoot
Page 67 and 68:
Fix It Yourself: Remove other stuff
Page 69 and 70:
Conclusion: Summary 67 - PC is stil
Page 71 and 72:
Conclusion: What else? 69 - try to
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