Not off the top of my head. The knowledge isn't tribal, but it's certainly scattered (few blog posts will give you take you the whole way) and the tools are...s

Not off the top of my head. The knowledge isn't tribal, but it's certainly scattered (few blog posts will give you take you the whole way) and the tools are...spartan. I recommend you read CTF writeups (there was one hosted on GitHub where a team retrieved the request signing key for Instagram IIRC). Those are usually very tutorial-like, though they tend to take some level of knowledge for granted even if they don't intend to. The other thing to do is pick up apktool, JD-GUI, dex2jar and maybe IDA Pro, Hopper or JEB and learn them as you you go.