Search Results for: ollydbg
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: https://www.ethicalhacker.net/features/special-events/reverse-engineering-101-newbie-contest-webcast-elearnsecurity 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 […]
Mirror for BoB’s Immunity Debugger projects
This page serves as a mirror for 2 Immunity Debugger related projects, written by BoB. Unofficial PDK v1.03 for Immunity Debugger Original project page : http://bob.droppages.com/Projects/Immunity+Debugger/PDK Long ago in November 2008 I created an unofficial Immunity Debugger PDK, and I have now updated it in 2011 for the Immunity Debugger v1.8x plugin format changes. Plugins […]
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.
Continue reading
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.
Continue reading
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 […]
Exploit writing tutorial part 7 : Unicode – from 0x00410041 to calc
Finally … after spending a couple of weeks working on unicode and unicode exploits, I’m glad and happy to be able to release this next article in my basic exploit writing series : writing exploits for stack based unicode buffer overflows (wow – that’s a mouthful). You may (or may not) have encountered a situation […]
Exploit writing tutorial part 6 : Bypassing Stack Cookies, SafeSeh, SEHOP, HW DEP and ASLR
Introduction In all previous tutorials in this Exploit writing tutorial series, we have looked at building exploits that would work on Windows XP / 2003 server. The success of all of these exploits (whether they are based on direct ret overwrite or exception handler structure overwrites) are based on the fact that a reliable return […]
Exploit writing tutorial part 5 : How debugger modules & plugins can speed up basic exploit development
In the first parts of this exploit writing tutorial, I have mainly used Windbg as a tool to watch registers and stack contents while evaluating crashes and building exploits. Today, I will discuss some other debuggers and debugger plugins that will help you speed up this process. A typical exploit writing toolkit arsenal should at […]
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 […]
Exploit writing tutorial part 3 : SEH Based Exploits
In the first 2 parts of the exploit writing tutorial series, I have discussed how a classic stack buffer overflow works and how you can build a reliable exploit by using various techniques to jump to the shellcode. The example we have used allowed us to directly overwrite EIP and we had a pretty large […]
Donate
Your donation will help funding server hosting.
