Monday, August 23, 2010

FOAM file fuzzer

FOAM is a general purpose file fuzzer I wrote in order to find offset values quickly. It is written in python so you will need on your system.

The script can be downloaded at

Tuesday, August 3, 2010

From 0x90 to 0x4c454554, a journey into exploitation.

I put some time in and compiled a list in a course type layout to help people in process of learning exploit development. I hope my research will help others spend more time learning and less time searching.

First off I want to thank the corelan guys for the help they have provided me so far in the process.

layout: I will be posting in a hierarchical structure, each hierarchy structure should be fully understood before moving on to the next section. I will also post sets of Parallel learning topics that you can use to study in line with other topics to help prevent monotony. These Parallel areas will have a start and end mark which shows when they should be complete in perspective to the overall learning

desktop background Link to Backgrounds

Other Posts like this one:
Because of quality of these posts I wanted to put them at the top. I could not figure out where to put them in the list because they cover so much.
past-present-future of windows exploitation
smashing the stack in 2010

  1. Part 1: Programming

  2. Parallel learning #1:(complete this section before getting to the book "Hacking Art of exploitation")
    While going through the programming area I concentrate on core topics to help us later on with exploit writing. One area that is very good to pick up is some kind of scripting language. Listed below are some of the most popular scripting languages and ones I feel will prove to be the most useful.

    Python: One of my favorite languages and growing in popularity python is a powerful language that is easy to use and well documented.
    Learn Python the hard way
    Wikibooks Python
    Grey hat python

    Ruby: If you plan on later on working inside of metasploit this may be the language you want to start with. I highly suggest this for exploit developers to learn.
    Wikibooks Ruby
    Ruby Programmers Guide

    Perl: An older language that still has a lot of use perl is one of the highest used scripting languages and you will see it used in many exploits. (I would suggest python over perl)
    [book] O'Reilly Learning Perl

    C and C++ programming:
    It is very important to understand what you are exploiting so to get started let us figure out what we are exploiting. You do not need to go through all of these but when finished with this section you should have a good understanding of C and C++ programming.

    X86 Assembly:
    Ok now to understand what the computer reads when we compile C and C++. I am going to mostly stick to the IA-32(X86) assembly language. Read the first link to understand why. It explains it very well.
    Skullsecurity: Assembly
    Windows Assembly Programming Tutorial
    [book]The Art of Assembly
    Assembly primer for hackers
    PC Assembly Language

    Windows Programming:
    This is to help understand what we are programming in and the structure of libraries in the OS. This area is very important far down the line's_Win32APITutorial.pdf
    [book]Windows Internals 5
    [book]Windows Internals 4

    Dissassembly is not as much programming as it is what the computer understands and the way it is interpreted from CPU and memory. This is where we start getting into the good stuff.
    The Art of Disassembly

  3. Part 2: Getting started

  4. Now that we have a very good understanding of programming languages and what the machine is doing we can start working on task at hand, exploitation.
    Here I will start a lot of the learning in very much a list format and adding in comments or Parallel learning areas when needed.

    Smash the stack for fun and profit (Phrack 49)
    C function call conventions and the stack
    Anatomy of a program in memory
    Function Calls, Part 1 (the Basics)
    IA-32 Architecture
    [videos]Code Audit from

    (Parallel learning #1 finished: You should now have finished on Parallel learning 1 and have a good understanding of one of the 3 languages)

    [Book]Hacking art of exploitation [Chapter 1&2]
    Corelan T1
    Corelan T2

    Parallel learning #2:(complete this section before end of part 2)
    (Read the first few posts on this blog has some good info)
    Kspice blog
    (Read some of the post from this blog they are very helpful with starting out with fuzzers.)
    Nullthreat's blog
    (I am linked directly to a demo exploit for this area but this is a useful blog to keep track of for many things)
    A demo exploit Buffer overflow intro
    The Tao of Windows Buffer Overflow
    nsfsecurity on BOF
    Hacker center: BOF
    [video]Buffer overflow Primer
    [Book]Shellcoder's Handbook Ch1&2
    [Book]Hacking art of exploitation [Chapter 3]
    Corelan T3A
    Corelan T3B
    SEH Based Exploits and the development process
    SEH overwrite simplified

    ((Parallel learning #2 finished:)

  5. Part 3:Tools of the trade

  6. This is a list of tools I have started using and find very useful.
    Immunity Debugger
    IDA Pro
    explorer suite

    And here are some corelan posts on how to use them. I will supply more in future but this is a very good start.
    Corelan T5
    Corelan: Immunity debugger cheatsheet

  7. Part 4: Network and Metasploit

  8. (Networking) network programming
    [Book]Hacking art of exploitation [Chapter 4]
    Socket Programming in ruby

    [Video]Security Tube: Metasploit Megaprimer
    Metasploit Unleashed
    [video]Metasploit Louisville Class
    Metasploitable (a target)
    Corelan T4
    intern0t: developing my first exploit
    [video]DHAtEnclaveForensics: Exploit Creation in Metasploit
    Wikibooks Metasploit/Writing Windows Exploit

  9. Part 5: Shellcode

  10. Corelan T9
    projectShellcode: Shellcode Tutorial
    [Book]Shellcoder's Handbook Ch3
    [Book]Hacking art of exploitation [Chapter 5]
    Writing small shellcode
    Shell-storm Shellcode database
    Advanced shellcode

  11. Part 6: Engineering in Reverse

  12. Parallel Learning #3:(constant place to reference and use for reversing)
    Understanding Code
    Reverse Engineering the World
    Reversing for Newbies reversing blog post intro to reverse engineering Intro to Reverse Engineering software
    [Book]Reversing: secrets of reverse engineering
    [video]Reverse Engineering from
    CrackZ's Reverse Engineering Page
    Reverse engineering techniques
    Windows PE Header
    OpenRCE Articles


  13. Part 7: Getting a little deeper into BOF

  14. Parallel Learning #4:(To the end of the course and beyond)
    Find old exploits on Exploit-db download them, test them, rewrite them, understand them.

    (Part A: preventions)
    Buffer overflow protection
    The evolution of Microsoft's Mitigations Canary Bit
    Preventing the exploitation of SEH Overwrites with SEHOP
    Bypassing SEHOP
    Wikipedia Executable space protextion
    Wikipedia DEP
    Bypassing Hardware based DEP
    Wikipedia ASLR
    Symantec ASLR in Vista
    Defeating the Stack Based Buffer Overflow Prevention
    Corelan T6
    Return to libc
    [video] microsoft protections video

    (Part B: Advanced BOF)
    [video]Exploitation from
    Corelan T7
    Corelan T8
    Corelan T10
    Virtual Worlds - Real Exploits

    [GAME]Gera's Insecure Programming
    [GAME]Smash the stack wargaming network

  15. Part 8: Heap overflow

  16. Heap Overflows for Humans-101
    rm -rf / on heap overflow
    w00w00 on heap overflow
    [book]Shellcoder's Handbook Ch4&5
    h-online A heap of Risk
    [video]Defcon 15 remedial Heap Overflows
    heap overflow: ancient art of unlink seduction
    Memory corruptions part II -- heap

    [book]Read the rest of Shellcoder's Handbook

  17. Part 9: Exploit listing sites

  18. Exploit-DB
    CVE Details
    National Vulnerability Database

    (bonus: site that lists types of vulnerabilties and info)
    Common Weakness Enumberation

  19. Part 10: To come

  20. 1. Fuzzing
    2. File Format
    3. and more

    If anyone has any good links to add post a comment and I will try to add them or send me the link and I will review and add it.

    If anyone finds any bad or false information in any of these tutorials please let me know. I do not want people reading this getting bad information.