Objective-C Calling Conventions for iOS Reverse Engineering

In this video, we learn how to follow Objective-C calling conventions for iOS Reverse Engineering and see how the Objective-C runtime uses message passing to invoke functions.
---
Timestamps:
00:00 Intro
00:44 Message Passing
01:23 Example IPA
01:59 blurBottomBgView
02:39 objc_msgSend
04:27 Method Selector Colons
06:30 ID Types
08:10 Method Invocation Madness
09:15 _objc_release() calls
10:19 UIBlurEffect Class
11:43 Source code of Method
12:27 Developer Method Names Trick!
14:30 Recap
---
Links Mentioned in Video:
Ghidra:
ghidra-sre.org/
objc_msgSend:
developer.apple.com/documenta...
LCActionSheet Class:
github.com/iTofu/LCActionShee...
---
Malware Examined in the video (goontact):
sha256:712e780afe2f0c4ccd0aa110d57c300d669bff4b5912ef9316b644a4ddbb6183
---
laurieWIRED Twitter:
/ lauriewired
laurieWIRED Website:
lauriewired.com
laurieWIRED Github:
github.com/LaurieWired
laurieWIRED HN:
news.ycombinator.com/user?id=...
laurieWIRED Reddit:
/ lauriewired

[@TarasZakharchenko]

Just spotted your channel. It is AWESOME! I cannot understand why you having just 20K subs. Here is everything: Lain IRL, low level staff I a fond of, cybersec insights which are useful for me as dev.

[@graham-moss]

Your videos are so well done. I'd be really interested to know what your production process is.

[@fionnlanghans]

Serial Experiments Lain is cool. Also, I learned something.

[@shriokei]

learned something, I really like this channel! and her voice is so chill 🌐

[@knobbymcfeck]

This is such a neat video format, thank you so much!

[@saintswolfgang_]

I love your website. it's cute and quirky, especially with the music.

[@muxerous]

Your channel is a treasure and a masterpiece❤

[@exalted1ne]

How well do you normally need to know each programming language or does it all sort of end up looking the same from Ghidra and you can just navigate regardless of the language?

[@ganeshkumargopinathan6375]

Good one Laurie! Please do more videos on macos malware

[@giuseppesec]

at defcon rn and cant wait to see your talk. also more objc vids?

[@lauriewired]

More to come!

[@jetstreamsham4968]

How'd you do the voice thing at the beginning?