iPhone Rootkit? There's an App for that! - Reverse Engineering Mac ...

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Reversing StepsAnalyzed the PDF• Barebones PDF. Viewer shows one “empty” page• Compared PDFs between iOS device/version− A single zlib deflated font section is the only difference• Deflate this section - strings indicate a whole MACH-O dylib in theresomeplace• Wrote a quick file splitter “extract_payload”• Found 3 parts− CFF Font egg− Macho_1− Macho_2Copyright Trustwave 2010
… continued: eggMalformed Times-‐Roman CFF Font ... Compiled code extracted from dylib chunk at end of payload: (aka macho_2 or ‘one.dylib’) Copyright Trustwave 2010
Page 5 and 6: iPhone/iOS Security Overview
Page 7 and 8: Architecture OverviewApplications P
Page 9 and 10: Application SecurityCode signing•
Page 11 and 12: Jailbreaking Overview
Page 13 and 14: Jailbreakme.com A Thing to Behold
Page 15 and 16: What it looks likeVisit h'p://jailb
Page 17 and 18: Weaponizing
Page 19 and 20: Patch PlanReversing the installui.d
Page 21 and 22: My “Big Fat Rootkit”… so farC
Page 23 and 24: Set-upA vanilla un-jailbroken iPhon
Page 25 and 26: Hardware: Mic and AudioAudio record
Page 27 and 28: Dumping Process DataSeveral interes
Page 29 and 30: Targeting iOS ApplicationsiOS isn
Page 31 and 32: Demo App Backdoor
Page 33 and 34: Binary Reversing Prep (continued…
Page 35 and 36: No More SecretsHint: find the LC
Page 37 and 38: Mach Binary Encryption (continued
Page 39 and 40: What’s your point?For starters…
Page 41 and 42: Objective-C Method HookingIt’s ca
Page 43 and 44: Objective-C Method Hook ExampleLets
Page 45 and 46: Injecting Our LibraryConventionally
Page 47 and 48: ConclusionsLots of security researc
Page 49: Reversing Redux: The Binary “star
Page 53 and 54: class-dump on installui.dylib (aka

iPhone Rootkit? There's an App for that! - Reverse Engineering Mac ...

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