To understand what he was dealing with, Alex didn't run the file. He used , a tool from the Radare2 framework, to look at the "sections" of the file. He needed to find the .text section—the part of the file where the actual code lives. Action: He ran rabin2.exe -S RPDFE2.exe .
Alex, a junior security analyst, found a file named RPDFE2.rar on an old training server. Inside was a single, obfuscated executable masquerading as a document. Instead of double-clicking it, Alex knew this was a puzzle designed to teach the "Radare2" workflow. 1. Inspecting the Skeleton RPDFE2.rar
He "seeked" to the start of the code using the command s [vaddress] . To understand what he was dealing with, Alex
He printed the assembly code from the start to the end of the .text section. Action: He ran rabin2
He noted the Virtual Address (where the code starts in memory) and the Size of that section, as suggested by experts on Stack Exchange . 2. Entering the Matrix
The final step was the most satisfying. The file was just a mess of hexadecimal numbers ( 0x48 , 0x89 ), but radare2 could translate those into assembly language—the low-level instructions humans can actually read.