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. Read more

Traditional Egghunter

An Egghunter is nothing more than an assembly routine to find shellcode somewhere in memory. We typically deploy an Egghunter when there is no more room in our buffer that we can use to initially redirect EIP Read more

September is going to be a busy month. With Brucon approaching very fast and Derbycon on its way as well, it looks like I will be spending more time at cons than at work :) I'll have the pleasure to teach the Corelan Live Exploit Development Bootcamp trainings at Brucon and Derbycon. If you are a student, make sure to check the prerequisites so we're all set to make the training a success for everyone. Read more

On June 14, 2011 HD Moore announced the Metasploit Bounty contest, offering a cash incentive for specific vulnerabilities to be submitted as modules in the Metasploit Framework. Titled "30 exploits, $5000 in 5 weeks", a post on the Rapid7 blog lists the 30 "bounties" selected by the MSF team, waiting for someone to claim and submit a working exploit module. Read more

Watobo author Andy Schmidt made 2 great videos about installing Watobo on Windows and on BackTrack 5. I created a rather simple and short shell script to install Watobo on BT5. Nothing new, nothing sensational, just to alleviate the installation process. Read more

This document describes the various commands, functionality and behaviour of mona.py. Released on june 16, this pycommand for Immunity Debugger replaces pvefindaddr, solving performance issues and offering numerous new features. pvefindaddr will still be available for download until all of its functionality has been ported over to mona. Read more

Ahh.. Vegas.. What happens in Vegas, stays in Vegas right ? With a variety of cons ahead (BlackHat, Defcon, B-Sides, …) there is plenty of things that can and will happen at Vegas. Will you be there to witness & enjoy it ? Getting to Vegas is just one part of the story. Getting access to one of the cons is the second part, but in case of B-Sides, there are no tickets left anymore. So, in case you were not able to get one of the free tickets to B-Sides LV, there's good news ! We have 2 tickets for B-Sides LV (august 3 & 4, 2011)… and we're giving them away...but not without a little 'battle'... Read more

Over the last few weeks, there has been some commotion about a universal DEP/ASLR bypass routine using ROP gadgets from msvcr71.dll (written by Immunity Inc) and the fact that it might have been copied into an exploit submitted to Metasploit as part of the Metasploit bounty. I'm not going to make any statements about this, but the ROP routine itself looks pretty slick. Read more

FINALLY ! After spending almost 6 months of designing, developing and testing, and after 'surviving' 2 presentations (at AthCon and Hack In Paris), I am extremely excited and proud to present, on behalf of the entire Corelan Team, the general availability of mona.py. With this announcement, we also declare pvefindaddr officially dead from this point forward. (This doesn't mean pvefindaddr is now entirely worthless, because not all functions have been ported into mona yet, but we won't be releasing any updates to pvefindaddr anymore and the entire project page/download page will eventually disappear) Read more

Introduction

I think we all agree that bypassing DEP (and ASLR) is no longer a luxury today. As operating systems (such as Windows 7) continue to gain popularity, exploit developers are forced to deal with increasingly more memory protection Read more