iOS Reverse Engineering :: Part I :: Dynamic Reversing and iOS Basics

[@roz0n]

Just discovered your videos. You are a blessing from god. Thank you for sharing all this!

[@anasshaikh5778]

This went above my head.

[@drygordspellweaver8761]

I'm loving the channel so far, thank you! Could you clarify more on this debugging combo method you talked about at the end? "ios Debugger combo: attach frida to inject fuzzing payload set breakpoint in target. Attach debug server Use IDA to decompile, press f5 and see your code, set breakpoint on something that looks like c code while still having advantage of being able to inject something with frida." So is this basically like a free workaround to have a dynamic way of interacting with IDA without paying for the pro/debugger setup? Would IDA free static analysis also be able to provide C-like code or is that only available with Pro version + IOkit?

[@jiskac]

Hey :) No, you still need the IDA Pro debugger! It just means that you can use both in parallel, like, attach with both Frida + IDA. But of course attaching with IDA only works if you have the pro version with a debugger.

[@drygordspellweaver8761]

@@jiskac Thanks for the clarification! I kinda encountered some bizarre "hidden bits" in my objective C reversing project that I couldn't decompile even with hopper/IDA. I then searched for some tool on github to do it but couldn't even build the project XD It seems like a very fascinating field but is so hard to come by many resources or training.

[@depressivepumpkin7312]

this is pure gold, thank you

[@kiyotaka31337]

Hey jiska thanks for the videos, Im new to iOS security research I've been doing my research on ios baseband Im able to extract baseband firmware and RE the baseband but to debug I jailbreaked my iphone now I can't use simcard tried many ways to fix but It won't work or did I do anything wrong, or any other ways to emulate ios baseband firmware ? This would be helpful. I used iphone 7 ios 14.7.1

[@0xjust-n0-one]

Thanks for doing this! Great stuff!

[@josefmostafa5121]

Richtig Gut!

[@anasshaikh5778]

Can you recommend a book or any other resources which is noob friendly

[@jiskac]

Some basics are covered in James Duffy's "iOS Research & Exploration Volume 1". But many details are missing, so it's probably the best to work through the massive and less beginner-friendly "*OS Internals" books by Jonathan Levin.