I decided to start taking reverse engineering more serious as it is something that I have always wanted to understand. I will be using resources online, mostly free ones with the exception of a few things. (Thanks to dee-see & lillost for the windows vm link)
I found this workshop which seems like a good introduction, called begin.re. At the end of the workshop I will attempt to do the following CTFs:
- zombieland
- reversing hero might buy the videos that come with the exercises
I want to be able to complete both of these two challenges by the time I'm done with the begin.re workshop. I will be releasing a blog post every Sunday highlighting what I have learned as well as sharing resources I learn about, if you have any please share them in the comments.
Welcome
The first session in Preparations Assignments
called Welcome, is a primer for x86
assembly, it referenced this doc:
- registers
- general registers:
EAX
,EBX
,ECX
,EDX
- index registers:
ESI
,EDI
,EBP
,EIP
,ESP
- general registers:
- stacks
- data structure (FILO)
- keep track of the point to which an active subroutine should return when it finished executing
- local data storage
- parameter passing
- instructions
- usually fall into 3 categories
- data movement
- arithmetic/logic
- control flow
- memory and addressing modes
- modern
x86
processors are capable of addressing2^32
bytes of memory
- modern
Installing FlareVM
Installing FlareVM is recommended to complete the zombieland CTF
by the author, this makes sense for me since most of the material I want to learn will be Windows
relates because I want to use what I learn at work. The process was easy once I found the right blog about how to install the script needed to set up the whole thing. If you want to follow along use this link which is from FireEye
the creators of the FlareVM
.
To use FlareVM
you will need a Windows
VM, for this I used the VMs available from widows here (I'm using Virtual Box). You can select which VM to use from the dropdown, I went for the MSEdge on Windows 10
. Once I downloaded the VM, I followed the instructions from the Fire Eye
blog and just followed along, the process did take around 2 hours for me, since I'm running Virtual Box
on a potato. Once the script finished, I checked it out and I had all the tools needed to start, list of tools included here
Thoughts
begin.re - welcome
Good primer, I've tried learning x86
before so this helped me, I spent the week reading through the primer and started on the next section which goes more in depth into what a stack
is and what it does.
FlareVM
Easy to install if you follow the right directions, took a while but that's mostly because . I can't wait to start messing with the software and understand how the tools work.
Resources
FlareVm Installation
x86 RE Cheat Sheet
begin.re
OpenSecurityTraining
Malware Analysis VM Setup Tutorial
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