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

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Binary Reversing Prep (continued…)6. Dump the decrypted section to a file based on “cryptsize” from step #2 (4096)(gdb) dump memory decrypted.bin 0x2000 (0x2000 + 4096)7. Merge decrypted.bin back into SomeApp using your favorite hex editor.• Relative file offset for the encrypted data will be 0x1000 away from the machheader (aka cryptoff) .8. Don’t forget to disable “cryptid” so that class-dump and other tools will work onour fixed up binary. Change Cryptid to 0.Copyright Trustwave 2010
No More SecretsHint: find the LC_ENCRYPTION_INFO(0x21) load command by converAng “otool –l” output back to 32-‐bit li
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: Binary Reversing Prep (continued…
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 and 50: Reversing Redux: The Binary “star
Page 51 and 52: … continued: eggMalformed Times-
Page 53 and 54: class-dump on installui.dylib (aka

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