Search Results for: buffer overflow
WoW64 Egghunter
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 to. If we are able to load our shellcode elsewhere in process memory, the Egghunter will […]
Metasploit Bounty – the Good, the Bad and the Ugly
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.
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Hack Notes : Ropping eggs for breakfast
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 mechanisms, including DEP and ASLR. From a defense perspective, this is a good thing. But we […]
Cheat sheet : Installing Snorby 2.2 with Apache2 and Suricata with Barnyard2 on Ubuntu 10.x
After spending a few hours fighting a battle against Snorby and Apache2 + Passenger, I finally managed to get it to run properly on my Ubunty 10.x box (32bit). Looking back, I figured I might not be the only one who is having issues with this.
So I decided to publish the notes I took while setting everything up, and as a little bonus, explain how to install and configure Suricata as well (configured in combination with barnyard2 which will pick up local logs and send them to the remote MySQL server).
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The Honeypot Incident – How strong is your UF (Reversing FU)
Interested in capturing, documenting and analyzing scans and malicious activity, Corelan Team decided to set up a honeypot and put it online. In the first week of december 2010, Obzy built a machine (default Windows XP SP3 installation, no patches, firewall turned off), named it “EGYPTS-AIRWAYS”, set up a honeypot + some other monitoring tools, and connected it to the internet.
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Metasploit module : HTTP Form field fuzzer
Introduction About a month after releasing an ftp client fuzzer module for Metasploit, I decided to release yet another fuzzer module I have been working on over the last few weeks. This new module can be used to audit web servers/web server plugins/components/filters, by fuzzing form fields and optionally fuzz some header fields. While this […]
Exploiting Ken Ward Zipper : Taking advantage of payload conversion
In the article I wrote on the abysssec.com website, I explained the steps and techniques needed to build a working exploit for Ken Ward’s zipper. One of the main difficulties I had to overcome when building the exploit, was the character set limitation. I basically could only use a subset of the ascii characters (only […]
Starting to write Immunity Debugger PyCommands : my cheatsheet
When I started Win32 exploit development many years ago, my preferred debugger at the time was WinDbg (and some Olly). While Windbg is a great and fast debugger, I quickly figured out that some additional/external tools were required to improve my exploit development experience. Despite the fact that the command line oriented approach in windbg […]
About me
Hi, My name is Peter Van Eeckhoutte. I was born in 1975 and spent my childhood in a small town called Vichte, Belgium. 14 years later, I got my first computer and about 5 years later I started working in a computer shop where I was responsible for the technical department, servers/network installations, etc… I […]
Exploit writing tutorial part 3b : SEH Based Exploits – just another example
In the previous tutorial post, I have explained the basics of SEH based exploits. I have mentioned that in the most simple case of an SEH based exploit, the payload is structured like this : [Junk][next SEH][SEH][Shellcode] I have indicated that SEH needs to be overwritten by a pointer to “pop pop ret” and that […]
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