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Heap Layout Visualization with mona.py and WinDBG

Introduction Time flies. Almost 3 weeks have passed since we announced the ability to run mona.py under WinDBG. A lot of work has been done on mona.py in the meantime. We improved stability and performance, updated to pykd.pyd 0.2.0.14 and ported a few additional immlib methods to windbglib. I figured this would be a good […]

Happy New Year – here’s my special gift to you, corelanc0d3r

I’m not going to spend a lot of words on this. Facts speak for themselves. A short while ago, I discovered this: http://www.hackforums.net/showthread.php?tid=3031925 (you need to register to get access to the thread). Screenshot : idle-hands profile : Reputation I registered a useraccount “corelanc0d3r” and used the “Report” button, but for some reason my user […]

Corelan T-Shirt contest – Derbycon 2012

If you didn’t register your ticket for the Corelan Live Exploit Development training at Derbycon 2012, then there is bad news for you… We’re sold out. Not all is lost though. For the second year in a row, Corelan Team is giving away one free ticket to the Corelan Live training at Derbycon 2012, which […]

HITB2012AMS Day 1 – Window Shopping

Window Shopping: Browser Bugs Hunting in 2012 In the last talk of Day 1, Roberto Suggi Liverani and Scott Bell (not present during the presentation),  security consultants at Security-Assessment.com, will share the results of some intensive browser bug hunting research, and will drop 5 0days. Roberto starts by apologizing about the fact that Scott was not […]

HITB2012AMS Day 1 – One Flew Over The Cuckoos Nest

One Flew Over The Cuckoos Nest – Automated Malware Analysis Claudio Guarnieri, senior researcher at iSight Partner, and part of the Shadowserver Foundation and the HoneyPot project.  He works with malware on a daily basis, maintains malwr.com and is the main developer of the Cuckoo Sandbox, which is also the main topic of his talk. […]

HITB2012AMS Day 1 – Intro and Keynote

Introduction Good morning everyone, After spending a couple of hours on the train, picking up my HITB badge, meeting with some of the organizers and having a great evening hanging out with Steven Seeley, Roberto Suggi Liverani, Nicolas Grégoire, Andy Ellis, Didier Stevens, and some other folks, conference time has arrived. With the conference taking place […]

Hack In The Box Amsterdam 2012 – Preview

In less than a week from now, Hack In The Box Amsterdam will open its 2012 edition. The conference will take place in the Okura Hotel, and features 3 days of training, 2 days of quad-track talks, a CTF and HackWEEKDAY, a 12 hour hackathon hosted alongside the actual confererence. The line-up looks promising…
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Reversing 101 – Solving a protection scheme

In this post, we’ll look at an application reversing challenge from HTS (hackthissite.org) 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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Debugging Fun – Putting a process to sleep()

Recently I played with an older CVE (CVE-2008-0532, http://www.securityfocus.com/archive/1/489463, by FX) and I was having trouble debugging the CGI executable where the vulnerable function was located.
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Exploit writing tutorial part 11 : Heap Spraying Demystified

A lot has been said and written already about heap spraying, but most of the existing documentation and whitepapers focus on IE7 or older versions.
Although there are a number of public exploits available that target IE8, the exact technique to do so has not been really documented in detail.
Of course, you can probably derive how it works by looking at those public exploits.

With this tutorial, I’m going to provide you with a full and detailed overview on what heap spraying is, and how to use it on old and newer platforms.
I’ll start with some “ancient” techniques (or classic techniques if you will) that can be used on IE6 and IE7.
We’ll also look at heap spraying for non-browser applications.
Next, we’ll talk about precision heap spraying, which is a requirement to make DEP bypass exploits work on IE8.
I’ll finish this tutorial with sharing some of my own research on getting reliable heap spraying to work on IE9.
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Since 2011, Corelan GCV has been teaching live win32 exploit dev classes at various security cons and private companies & organizations.

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