Defiling Mac OS X - Ruxcon - Reverse Engineering Mac OS X - PUT ...

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TECHNIQUES GETTING CODE INTO THE KERNEL Historically, a few options: ‣ The legit KEXT interface use this guy We’ll ‣ The Mach VM API ‣ /dev/kmem ‣ Kernel vulns ‣ Patch the kernel (and/or kernelcache) on disk One new one ‣ Patching the kernel from EFI Defiling Mac OS X - Ruxcon November, 2011
TECHNIQUES GETTING CODE INTO THE KERNEL /dev/kmem ‣ Disabled on OS X since the first x86 version ‣ Available with a boot arg ‣ kmem=1 ‣ Not much fun ‣ Amit Singh provided a KEXT for re-enabling it too ‣ See Mac OS X Internals: A Systems Approach Defiling Mac OS X - Ruxcon November, 2011
Page 1 and 2: DEFILING MAC OS X: KERNEL ROOTKITS
Page 3 and 4: STUFF Things I will talk about ‣
Page 5 and 6: Defiling Mac OS X - Ruxcon November
Page 7: GETTING CODE INTO THE KERNEL Defili
Page 11 and 12: TECHNIQUES GETTING CODE INTO THE KE
Page 13 and 14: TECHNIQUES DODGY KERNEL SYMBOL RESO
Page 15 and 16: TECHNIQUES DODGY KERNEL SYMBOL RESO
Page 17 and 18: TECHNIQUES SYSCALL HOOKS Old faithf
Page 19 and 20: TECHNIQUES SYSCALL HOOKS static str
Page 21 and 22: TECHNIQUES TRUSTEDBSD HOOKS Trusted
Page 23 and 24: TECHNIQUES TRUSTEDBSD HOOKS kern_re
Page 25 and 26: TECHNIQUES NETWORKING HOOKS Registe
Page 27 and 28: ROOTKITTERY Defiling Mac OS X - Rux
Page 29 and 30: TECHNIQUES PROCESS PRIVESC void pro
Page 31 and 32: TECHNIQUES HIDING PROCESSES Might l
Page 33 and 34: TECHNIQUES HIDING FILES Hiding file
Page 35 and 36: ONE MORE THING... *cue turtleneck*
Page 37 and 38: EFI THE EXPLOSIVE FARMVILLE INVARIA
Page 39 and 40: EFI THE EXPANSIVE FURNITURE INTERFE
Page 41 and 42: REFERENCES Mac OS X Kernel Programm

Defiling Mac OS X - Ruxcon - Reverse Engineering Mac OS X - PUT ...

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