Posted on July 17, 2011 by Edd, on canthack.org. Radare2 is an open-source reverse engineering toolkit, consisting of a disassembler, debugger and hex editor. In this article I will show you the basics by reversing some shellcode I found on Project Shellcode. To put this into context let’s briefly discuss what we mean by the term “shellcode”, not to be confused with “shellscript”, which is something else entirely. “Shellcode” is a term colloquially used to refer to the payload of an exploit.