Reversing for beginners 2

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by @binaryheadache

Périphériques & matériel

Reversing for beginners 2
Simple keygen with radare2
Sven Steinbauer (@binaryheadache)

Recap
Cast your mind back to previous talk
registers
mov command
conditional jumps
basic math (add, sub)
the stack

Today we'll apply that
1. Quick overview of our tool: radare2
2. Analyse the binary
3. Reverse the keygen algorithm
4. Write a keygen ourselves

RAw DAta REcovery
11 years old
Reversing framework
Debugger
Assembler & disassembler
Scriptable
and much more
we'll barely scratch the surface

An ordinary keygenme
from crackmes.de level 2
http://ow.ly/sMxj30aypvK
linux x86 32bit
compiled with nasm
no external libs
very simple

Ques ons?
sven@unlogic.co.uk
@binaryheadache

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