In this video, you’ll learn how to use frida-trace to search for an Objective-C needle in a haystack. More specifically, we’re looking for the object holding messages within Signal. Once we find it, we cast it to a printable string.
Full playlist of reversing shorts:
Chapters:
00:00 – Why certain objects and how they are processed matters
00:30 – Ambiguous object names
01:01 – Adding Objective-C class+method to frida-trace
01:37 – Excluding noisy calls
02:15 – Identifying TSMessage
03:39 – Printing the TSMessage body with its correct type