I just gave a talk/workshop today (03/2020) at EthCC 2020 (Paris – France), about reversing Ewasm (Ethereum flavored WebAssembly) smart contract.
In this talk, I briefly introduce WebAssembly concepts , Ewasm ethereum specificity and opcodes/instructions. Secondly, I show how to create Ewasm smart contracts and expose different techniques/tools to perform WebAssembly module closed-source analysis. Finally, we go through some basic examples to apply reversing (reverse engineering) on those Ewasm contracts and understand the logic inside.
If you are interested about WebAssembly security (from both reversing and fuzzing point of view), I decided to convert my 4-day live training into recorded courses.
More details about my courses here.