reverse engineering

Using DBI for solving Reverse Engineering 101 – Newbie Contest from eLearnSecurity

Introduction Last weekend I had some time so I wanted to have a look at a reversing challenge which you can find here: Reverse Engineering 101 Contest Steps Get the exe to be hacked Break it open and start exploring. The only rule for the challenge is that it has to be solved by […]

BlackHatEU2013 – Day2 – DropSmack: How cloud synchronization services render your corporate firewall worthless

Jake Williams (@malwareJake) from CSR Group has more than a decade of experience with systems engineering, network defines, malware reverse engineering, penetration testing and forensics. He spent some good time looking at Cloud synchronization services and is presenting some findings in this talks. First of all, think of Dropbox (or any similar tools) as a […]

HITB2012AMS Day 2 – Taint Analysis

Automatically Searching for Vulnerabilities: How to use Taint Analysis to find Security Flaws (by Alex Bazhanyuk (not present) and Nikita Tarakanov, Reverse Engineers, CISS) Nikita explains they have been working on reversing binaries and auditing source code for a long time.   Alex currently works on the BitBlaze work, and moved to the US to […]

Reversing 101 – Solving a protection scheme

In this post, we’ll look at an application reversing challenge from HTS ( resembling a real-life protection scheme.
Put simple, the program creates a key for your username, and compares it to the one you enter.
The goal of the HTS challenge is to create a key generator, but I just want to demonstrate how to retrieve the password.
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Many roads to IAT

A few days ago a friend approached me and asked how he could see the import address table under immunity debugger and if this could be done using the command line.

I figured this would be a good time to take a look at what the IAT is, how we can list the IAT and what common reversing hurdles could be with regards to the IAT.
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Codegate 2011 CTF – Binary200 – Anti Debugging Techniques Explained


Again I stumbled upon a nice reverse-me, binary200 from the Codegate 2011 CTF.
And again there are some really interesting anti-debugging tricks implemented, so I decided to produce another video.
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