Reverse Engineering with Radare 2

Harness the Power of the Open-Source Radare2 for Your Reverse Engineering Projects

Created by : Rated :4.6 26353 views

Last Updated: 2023-03-22 11:03:35 English Course Type: Self Learning

How to use Radare 2 to reverse engineer binaries.
Disassembling binaries.
Navigating in the binary.
Debugging executables.
Patching executables.

In this course we will learn about the Radare 2 reverse engineering framework. It is an open source free alternative to IDA Pro. I started to work with it because I think nobody will buy IDA Pro unless it is paid by your employer. Radare 2 is a perfect free alternative, its only disadvantage is that it could be hard to start using it. This is where this course comes in. My goal was to get you over the hard part as fast as possible. So that you can get comfortable with Radare 2.

These are the things you will learn in this course:

Setting up Radare
Understanding its syntax
Understanding its config
Information gathering about the binary
Navigation in the binary
Cross references
Run-time debugging
Patching the binary

However there are a few things that are not goals of this course:

We are going to focus on the tool and not on assembly, so this is not an assembly course. You can follow along without understanding everything in assembly and that is fine, but don’t expect that you can learn assembly in a few hours.
We will learn some reverse engineering techniques but it is not our goal to learn everything.

However what you are definitely will learn is how to use Radare 2, and after this course if you need to analyse a binary you will be able to pull out radare from your sleeves anytime you need it.

All exercises are hands-on, so you are expected to repeat the exercises yourself. I have done quite a lot of trainings myself, live or online, and I can tell you that without practicing they won't stick. This is a really practical training so I encourage you to try everything yourself, because just watching the videos will only give you the illusion that you learnt something, 80% of the learning happens when you do the exercises.

Basic understanding of assembly.
Basic understanding of the linux terminal

People who already know basic reverse engineering and want to learn how Radare2.
Hackers looking for a free tool instead of IDA Pro.

Section 1 : Preparation 6 Lectures 00:15:07
Lecture 1 :
Introduction Preview
In this lecture I introduce the course, who should take it and how.
Lecture 2 :
Disclaimer
All ethical hacking courses should have a disclaimer, this is it for this course.
Lecture 3 :
What is Radare 2?
Quick introduction to the tool that we are going to discover in this course.
Lecture 4 :
Downloads
Hi, To follow along with the course and do the exercises please download the following virtual machine either for VirtualBox, which I will use in the rest of the course, or in OVA/OVF format that you can import as an appliance in VMWare as well : Virtualbox VM: https://onedrive.live.com/download?cid=C93CC20591AD4206&resid=C93CC20591AD4206%211355&authkey=AJcNxQ8CcHoYhRs OVAÂ format: https://onedrive.live.com/download?cid=C93CC20591AD4206&resid=C93CC20591AD4206%211365&authkey=AHlWHehkGfjF2iI To log in use username: aether password: 4ether The next lecture will show how to use this VM. See you there. Geri
Lecture 5 :
Target Application
This lecture quickly introduces the target software that we are going to reverse engineer with Radare2.
Lecture 6 :
Environment Setup
This lecture shows how to use the provided virtual machine and how to install Radare2 on other computers.
Section 2 : Reversing with Radare2 9 Lectures 01:51:36
Lecture 1 :
Radare2 Syntax
First encounter with Radare2's not-so-obvious-but-cool syntax.
Lecture 2 :
Configuration
Quick introduction to Radare2's configuration file.
Lecture 3 :
Binary Infos
Learn to extract the general information about the binary with R2.
Lecture 4 :
Navigating in the Binary
You are going to learn how to move around in the binary as your are trying to reverse different parts of it.
Lecture 5 :
Cross References
You will learn how to use cross references in Radare2, to find where elements are being used in the assembly code.
Lecture 6 :
Runtime Debugging
Radare2 is also great for dynamic debugging. This is what you will learn in this lecture.
Lecture 7 :
Patching
Patching the tested binary on disk or in memory could allow you to execute parts of the code you would not reach otherwise. We will go through how this can be done with Radare2.
Lecture 8 :
Cutter: the R2 GUI
Cutter is the best graphical user interface that Radare2 had so far. We will try cutter through solving a challenge from the Fireeye FLARE-ON challenges.
Lecture 9 :
Finishing the Challenge
In this lecture I will show you how to finish the FLARE-ON challenge.
Section 3 : What is next? 1 Lectures 00:03:11
Lecture 1 :
Next Steps
You arrived to the end of this course, however there is still plenty to learn about reverse engineering. I will give you some tips on how you can proceed and then we say good bye.

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Geri Revay,

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My name is Gergely (Geri) Revay and Iâ€™ve been working in IT security for quite a few years now. Currently Iâ€™m a penetration tester for a German consulting company. I started studying IT in elementary school. Later I went to a technical high school where I specialized in IT. Hence my very first programming and administration knowledge come from that time. Another important thing in my teenage years was that I attended the local student drama club. It was a lot of fun and also very useful if one has to present in front of an audience like I do. When I was 18 I started my university studies at the Budapest University of Technology and Economics which is a great University and Iâ€™m sure that it played an important part in what I have become and where Iâ€™m right now. In third year I was really eager to see a bit more from the awesome world so I went to Oslo, Norway and I spent an extremely interesting and unforgettable semester there as an exchange student at HÃ¸gskolen i Oslo which is now called HÃ¸gskolen i Oslo og Akershus. The most important lesson I learnt was that I love to be in an international environment and that eventually Iâ€™m a good communicator which I hadnâ€™t thought before. After returning to Hungary I started to work as a development trainee at Telenor Hungary. When my boss told me that I should install Linux at home as well because I was going to need it, I took his advice and hence the fun began. The company was an interesting place too, I got insight into the service provider world, learnt how MMS works and started to use php, perl, shell script etc. I was looking for opportunities to go abroad again, and I did. That time I went to Glasgow, UK where I worked for BT as a call centre advisor in sales. Although not working in my own professional field, it was an important experience of my life. First of all since then I cannot be mad at any call centre advisor however stupid and slow they are because probably itâ€™s just not their fault. Secondly I learned how to handle difficult people on the phone . Also one sales training in a lifetime is good for everybody, just to know how the world goes. Last but not least I got to know some of the weirdest English accents. When I returned to Hungary after 5 months I specialized in information and network security at the university and started working for Balabit IT Security as a quality assurance engineer. I had a chance to see this development company to grow from 40 people to 150. As the company grew my job changed quite a bit. At the beginning I worked on all products from syslog-ng to Zorp firewall with their customized Linux OS called ZorpOS. I was a Test team leader for a while before the company introduced the SCRUM development methodology which is a great stuff in my opinion. I saw how individual developers and testers slowly developed to become an efficient team and worked side-by-side without any typical QA vs. developer problems, how they learned to focus on the common target of building a quality product. At the end I worked with my team on the linux based appliance called syslog-ng Store Box. It was really interesting to work with such a complex system that included linux, SAN, hardware, php, python, C, javascript, syslog, aufs etc. Currently I work as a penetration tester digging into security as deep as I can. I also do some research when I have time.