Violent Python Book

Violent Python & Exploit Development

Working Connections Illinois

Sam Bowne

Schedule · Powerpoints · Projects · Links · Home Page

Class Description

Even if you have never programmed before, you can quickly and easily learn how to make custom hacking tools in Python. In hands-on projects, participants will create tools and hack into test systems, including:
  • Port scanning
  • Login brute-forcing
  • Port knocking
  • Cracking password hashes

In the exploit development section, students will take over vulnerable systems with simple Python scripts. Hands-on projects will include:

  • Bash command injection
  • Command injection via buffer overflow
  • ImageMagick exploitation
  • SQL injection
  • Exploiting PHP vulnerabilities
  • Linux buffer overflow
  • Buffer overflow on Windows 7
  • Exploiting Windows Server 2012
  • Fuzzing a vulnerable server
  • Structured Exception Handler exploitation on Windows
  • Defeating Data Execution Protection with Return-Oriented Programming

Technical Requirements

Participants need a computer (Windows, Mac, or Linux) with VMware Player or VMware Fusion. USB thumbdrives will be available with Kali Linux and Windows Server 2008 virtual machines to use.

All the class materials are freely available on my Web page ( for anyone to use.

Prerequisite Knowledge

Participants should be familiar with networking and security concepts at the Network+ and Security+ level. Previous programming experience is helpful but not necessary.

Learning Outcomes

Upon successful completion of this course, the student will be able to:
  1. Read and write simple Python scripts.
  2. Perform network attacks, including port scanning, port knocking, and brute-forcing logins.
  3. Find buffer overflow vulnerabilities with fuzzing.
  4. Create remote code execution exploits for Linux and Windows targets.
  5. Understand and defeat Windows defenses, including ASLR and DEP.


Violent Python: A Cookbook for Hackers, Forensic Analysts, Penetration Testers and Security Engineers by TJ O'Connor -- ISBN-10: 1597499579 (2012) Buy from Amazon

The Shellcoder's Handbook: Discovering and Exploiting Security Holes, by Chris Anley, John Heasman, Felix Lindner, Gerardo Richarte; ASIN: B004P5O38Q Buy from Amazon


Mon May 22, 1:00 - 6:00 pm Command Injection & SQL Injection
Tue May 23, 8:30 am - 5:00 pm Violent Python
Wed May 24, 8:30 am - 5:00 pm Exploit Development on Linux:
Stack overflows, heap overflows, format string exploits, shellcode, & debugging
Thu May 25, 8:30 am - 5:00 pm Exploit Development on Windows:
Buffer Overflows and Defeating Defenses
Fri May 26, 8:30 am - 12:00 pm Special Topics TBA


Violent Python

Violent Python: Introduction and Motivation (pptx)

When Vulnerability Disclosure Gets Ugly

Data Breaches and Password Hashes (pptx)

Links for demonstrations

Security Problems at Colleges (pptx)


Exploit Development

Exploiting Linux

Ch 2: Stack overflows on Linux (pptx)
Ch 3: Shellcode (pptx)
Ch 4: Introduction to format string bugs (pptx)
Ch 5: Introduction to heap overflows (pptx)

Exploiting Windows

Ch 6: The Wild World of Windows (pptx)
Lecture 7: Intro to 64-Bit Assembler (pptx)
Ch 8: Windows overflows (Part 1)
Ch 8: Windows overflows (Part 2)
Ch 14: Protection Mechanisms (pptx)

The lectures are in Word and PowerPoint formats.
If you do not have Word or PowerPoint you can use Open Office.

Projects: Command Injection

1. Ping Form Winners
2. Buffer Overflow Winners
3. ImageMagick Winners

4. SQL Injection Winners 1
Winners 2
Winners 3

Projects: Violent Python

Projects: Exploit Development

Linux Buffer Overflow Projects
5. Without Shellcode Practice
5a. 64-bit Overflow
5b. 64-bit PPT
6. Local Challenges
7. Remote Challenge Winners
8. Dash Shellcode Practice
9. Metasploit Shellcode Practice
10. Metasploit Shellcode Challenges Winners
Entire Exploit Development Course

Other Projects

Password Hash Projects

Cracking Linux Password Hashes with Hashcat
Cracking Windows Password Hashes with Hashcat

Web Projects

Exploiting SQLi with Havij and Input Filtering
Hijacking HTTPS Sessions with SSLstrip
Reverse-Engineering an Authentication Cookie
Password Guessing Games
Password Brute Force Challenges


Cracking a Caesar Cipher with CrypTool 2

Antivirus Evasion

Antivirus Evasion with Python
Keylogger with Python
Defeating Norton Antivirus with Python

Cultural Enrichment

How to view someones IP address and connection speed with TRACER T! - YouTube
I Pwned Your Server - YouTube

Exploit Development

Using Jasmin to run x86 Assembly Code
Assembly Code Challenges

Linux Buffer Overflow
Exploiting "Vulnerable Server" for Windows 7
Windows Server 2012 Buffer Overflow Defenses and EMET
Exploiting Easy RM to MP3 Converter on Windows 7
Fuzzing "Vulnerable Server"
Developing a SEH-Based Stack Overflow Exploit for "Vulnerable Server"
Defeating DEP with ROP

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Violent Python


Links for Chapter Lectures

Ch 1a: Anatomy of a Program in Memory - Excellent explanation from 2009
Ch 1b: assembly - difference between 'or eax,eax' and 'test eax,eax'

Ch 2a: Smashing the Stack for Fun and Profit by Aleph One
Ch 2b: Assembly Programming Tutorial
Ch 2c: GDB Command Reference - set disassembly-flavor command
Ch 2d: GDB Tutorial

Ch 3a: Unix uses only two privilege rings
Ch 3b: What's the difference of the Userland vs the Kernel?
Ch 3c: Protection ring - Wikipedia
Ch 3d: The GNU C Library: glibc
Ch 3e: linux - What is the difference between exit() and exit_group()
Ch 3f: Two excellent syscall examples with explanations
Ch 3g: c - Linux system call table or cheetsheet in assembly language - Stack Overflow
Ch 3h: NASM Tutorial
Ch 3i: Shellcode in C - What does this mean? - Stack Overflow
Ch 3k: C code to test shellcode, simpler than that in the textbook
Ch 3l: execve(2): execute program - Linux man page

Ch 4a: Format String Exploitation-Tutorial By Saif El-Sherel
Ch 4b: Exploiting Format String Vulnerabilities (from 2001)
Ch 4c: Advanced Format String Attacks (Paul Haas, Slides from DEF CON 18)
Ch 4d: Advanced Format String Attacks with demo videos
Ch 4e: Defcon 18 - Advanced format string attacks Paul Haas - YouTube
Ch 4f: Introduction to format string exploits -- with helpful gdb tips
Ch 4g: Ace Stream Media Format String Vulnerability (from 2014)
Ch 4h: Cisco Email Security Appliance Format String Vulnerability (9-9-2015)
Ch 4i: Graphviz Remote Format String Vulnerability, affects Ubuntu (from 2014)
Ch 4j: Polycom - H.323 Format String Vulnerability (from 2013)
Ch 4k: Python RRDtool Module Function Format String Vulnerability (from 2013)
Ch 4l: Broadcom UPnP Stack Format String Vulnerability (from 2013)
Ch 4m: pidgin-otr log_message_cb() Function Format String Vulnerability (from 2012)
Ch 4n: atexit(3) - Linux man page

Ch 5a: A Memory Allocator by Doug Lea
Ch 5b: Understanding the Heap & Exploiting Heap Overflows
Ch 5c: Several Interesting Heap Overflow Example Programs
Ch 5d: Four Excellent Heap Overflow Exercises
Ch 5e: Wonderful Exploit Exercises including VMs and heap overflows
Ch 5f: Dangling Pointer paper from Black Hat 2007
Ch 5g: Working example of a "Dangling Pointers" exploit?
Ch 5h: Dangling Pointers: Vulnerability and Exploitation Basics
Ch 5i: Much ado about NULL: Exploiting a kernel NULL dereference

Ch 6a: theForger's Win32 API Tutorial
Ch 6b: Process Explorer
Ch 6c: Portable Executable - Wikipedia
Ch 6d: PEview (PECOFF file viewer)
Ch 6e: Rebasing Win32 DLLs
Ch 6f: Why is 0x00400000 the default base address for an executable?
Ch 6g: VA (Virtual Adress) & RVA (Relative Virtual Address) - Stack Overflow
Ch 6h: Exploiting the LNK Vulnerability with Metasploit
Ch 6i: Is there any difference between a GUID and a UUID? - Stack Overflow
Ch 6j: Service Control Manager - Wikipedia
Ch 6k: Microsoft RPC Remote Procedure Call and End Point Mapper with Network Traces
Ch 6l: Setting Up Kernel-Mode Debugging over a Network Cable Manually (Windows Debuggers)
Ch 6k: IMMUNITY Debugger
Ch 6l: Operating Systems Development - Portable Executable (PE)

L7a: AMD64 Architecture Processor (pdf)
L7b: x64 Architecture - Windows 10 hardware dev
L7c: Introduction to x64 Assembly | Intel Developer Zone
L7d: Behind Windows x64's 44-bit Virtual Memory Addressing Limit
L7e: Windows 8.1 removes the 44-bit limitation (2015)
L7f: X86-64 (AMD64) Tutorial
L7g: AMD CPUID Specification
L7h: Searchable Linux Syscall Table for x86 and x86_64
L7i: Intel® 64 and IA-32 Architectures Software Developer’s Manual
L7j: 64-bit Linux stack smashing tutorial: Part 1
L7k: x86-64 - Wikipedia--AMD 64-bit processors only use 48-bit address space
L7l: Linux/x86_64 execve"/bin/sh"; shellcode 30 bytes
L7m: Writing shellcode for Linux and *BSD - Spawning a shell
L7n: Execve Shellcode 64 bit
L7o: Writing 64-Bit Shellcode - Part 1
L7n: 64 Bits Linux Stack Based Buffer Overflow
L7o: memory management - What and where are the stack and heap? - Stack Overflow

Ch 8a: Win32 Thread Information Block - Wikipedia
Ch 8b: TEB structure (Windows)
Ch 8c: Process Environment Block - Wikipedia
Ch 8d: PEB structure (Windows)
Ch 8e: assembly - What is the "FS" "GS" register intended for? - Stack Overflow
Ch 8f: Preventing the Exploitation of Structured Exception Handler (SEH) Overwrites with SEHOP (2009)
Ch 8h: SEH Based Overflow Exploit Tutorial - InfoSec Resources
Ch 8i: Windows ISV Software Security Defenses (2010)
Ch 8j: Software Defense: mitigating stack corruption vulnerabilities (2014)
Ch 8k: SEHOP per-process opt-in support in Windows 7
Ch 8l: Vista SP1 and Server 2008: Controlling SEHOP security protection
Ch 8m: Reducing the Effective Entropy of GS Cookies (2007)
Ch 8n: HeapCreate function (Windows)
Ch 8o: Heap Overflow: Vulnerability and Heap Internals Explained - InfoSec Resources
Ch 8p: Intercepting Calls to COM Interfaces - CodeProject
Ch 8q: Exploiting Lingering Vulnerabilities in Default COM Objects (pdf, 2011)
Ch 8r: OLE/COM Object Viewer Download
Ch 8s: Active X Exploitation - InfoSec Resources
Ch 8u: Dranzer | Vulnerability Analysis | The CERT Division
Ch 8v: dranzer download |
Ch 8w: dzzie/COMRaider on GitHub
Ch 8x: ActiveX vulnerabilities exploitation (from 2010)

Fuzz 1: Failure Observation Engine (FOE) tutorial - YouTube
Fuzz 2: Fuzz Testing for Dummies (2011)
Fuzz 3: Analyze Crashes to Find Security Vulnerabilities in Your Apps
Fuzz 4: VBinDiff - Visual Binary Diff
Fuzz 5: vbindiff(1) - Linux man page
Fuzz 6: An Introduction to Fuzzing: Using fuzzers (SPIKE) to find vulnerabilities - InfoSec Resources
Fuzz 7: Fuzzing with Peach Part 1
Fuzz 8: GlobalSCAPE CuteZIP Stack Buffer Overflow | Rapid7
Fuzz 9: Android Intent Fuzzer
Fuzz 10: Basic Fuzzing Framework (BFF) | Vulnerability Analysis | The CERT Division

Miscellaneous Links

SmashTheStack Wargaming Network
Great exploit tutorials from 2012 in the WayBack Machine
Exploit Exercises -- useful exploits and shells
Bypassing AV Scanners -- OLLYDBG PROJECT IN HERE
Valgrind Tutorial
Bypassing EMET's EAF with custom shellcode using kernel pointer (from 2011)
Disarming Enhanced Mitigation Experience Toolkit (EMET) v 5.0
Rootkits by Csaba Barta (from 2009)
PSA: don't run 'strings' on untrusted files -- WORTH EXPLOITING
From 0-day to exploit -- Buffer overflow in Belkin N750 (CVE-2014-1635)
Disarming and Bypassing EMET 5.1
BinScope Binary Analyzer -- vulnerability detector
Popular security suites open to attack -- DEP and ASLR Not Enabled
GDB: Debugging stripped binaries
PBKDF2 - Wikipedia
Installing VMware Tools on Kali Linux
Kali Linux Downloads
IMMUNITY : Download
How to setup Dark Comet RAT (with download and pictures) : hacking
Cython: C-Extensions for Python -- MAKES SMALL EXEs
HT Editor -- powerful binary ELF editor
ntpdc local buffer overflow - Exploit Development example, interesting GDB commands
Seven Resume Strategies for the Long-Term Unemployed
KdExploitMe - Hackable Windows Kernel Driver -- USE FOR PROJECTS
64-bit Linux Return-Oriented Programming
Exploit Exercises -- GOOD FOR PROJECTS
WIRESHARK 1.12.4 and below Access Violation and Memory Corruption PoC
Fuzzing with AFL-Fuzz, a Practical Example ( AFL vs binutils ) -- USEFUL FOR PROJECT
Radare portable reversing framework
Hopper: The OS X and Linux Disassembler -- GOOD FOR PROJECTS
Gdbinit: user-friendly gdb configuration file -- GOOD FOR PROJECTS
Format String Bug Exploration -USEFUL FOR PROJECT
90s-style security flaw puts "millions" of routers at risk -- LOOKS GOOD FOR A PROJECT
Exploit Development Class for Win 7 64-bit -- USEFUL FOR PROJECTS
EDB (Evan's Debugger) -- Like OllyDbg on Linux ty @offsectraining
Sophos AV Bypass - YouTube
New buffer overflow protection in gcc 4.9 -fstack-protector-strong
Old Versions of Kali Linux
Animated Metasploit Linux Payload in gdb - YouTube
Stack Smashing On A Modern Linux System
Buffer Overflow Vulnerability Lab
VMware Tools installation fails when Easy Install is in progress -- GOOD SOLUTION
Installing VMware Tools in an Ubuntu virtual machine
How to turn OFF (or at least override) syntax highlighting in nano via ~/.nanorc?
Exploit writing tutorial part 11 : Heap Spraying Demystified | Corelan Team

New Unsorted Links

How exploit writers find bugs in Java Machine? - Reverse Engineering Stack Exchange
Mac OS Xploitation (2009)
Fuzz 11: HOWTO : CERT Basic Fuzzing Framework (BFF) on Ubuntu Desktop 12.04 LTS
Ch 14a: What is
Ch 14b: Heap overflow using Malloc Maleficarum
Ch 14c: Windows 8 Heap Internals
Ch 14d: RdRand - Wikipedia
Ch 14e: \"We cannot trust\" Intel and Via\'s chip-based crypto, FreeBSD developers say
Fuzz 12: Fuzzer Automation with SPIKE - InfoSec Resources
Fuzz 13: Fuzzing with Spike to Find Overflows
Fuzz 14: [Python] IRC Fuzzer -
Fuzz 15: american fuzzy lop
Fuzz 16: Bug Hunting Using Fuzzing and Static Analysis
Ch 16a: Socket.NoDelay Property
Fuzz 17: Fuzzing Tools in Kali Linux
Ch 18a: Cscope Home Page
Ch 18b: Using Cscope on large projects (example: the Linux kernel)
Ch 18c: Exuberant Ctags
Ch 18d: Splint Home Page
Ch 18e: Splint the static C code checker
CH 18g: More Tricks For Defeating SSL In Practice
Ch 18h: CVE-2003-0161 -- Sendmail prescan() function vulnerability
Ch 18i: Port 25 (SMTP) - Remote Sendmail Header Processing Vulnerability
Ch 18j: PHP Hash Comparison Weakness A Threat To Websites, Researcher Says
Ch 18k: Dangling pointer - Wikipedia
Ch 18l: How to Create a Secure Login Script in PHP and MySQL - wikiHow
Modern Binary Exploitation class from RPI
Hopper 1: Use The Debugger with Hopper Disassembler/Decompiler - YouTube
Hopper 2: Tutorial
Hopper 3: Hopper Download
Hopper 4: Linux Installation
MemGC and Control Flow Guard (May, 2015)
Hopper 5: Intro to Hopper - YouTube
Hoper 6: Crackmes | Reverse Engineering Mac OS X
A binary analysis, count me if you can -- VERY USEFUL
picoCTF 2014 Baleful - Solving with Pin -- INTERESTING TECHNIQUE
Hopper 7: Linux x86 Program Start Up -- EXCELLENT EXPLANATION
How to detect a NX stack and other protections against buffer overflows -- VERY USEFUL
ROP for Linux ELF files: finding \'JMP ESP\'
Performing a ret2libc Attack -- USE FOR NEW LINUX PROJECT
How to disable ASLR in linux permanently.
Python multiprocessing.Pool: -- EXCELLENT EXAMPLE
Exploiting memory corruption bugs in PHP Part 3: Popping Remote Shells
Execute Bash Commands Without Spaces with Brace Expansion
x64dbg: An open-source x64/x32 debugger for windows -- ALTERNATIVE TO IDA PRO
gdb bug on 64-bit ubuntu with fix: No module name libstdcxx - Stack Overflow
gdb - debugging with pipe using mkfifio
Fuzzing on MacOS X -- MANY USEFUL TIPS
Carnegie Mellon - Tools - VulWiki
The Ultimate Disassembly Framework -- Capstone
binjitsu/binjitsu: CTF framework and exploit development library
How To Install VMware Workstation 11 On Ubuntu 14.10
Exploitation of mem-corruptions vulns in remote C/C++ programs without source or binary
Artistic Rendering of Exploit Development Process
Blind Return Oriented Programming (BROP)
Linux Assembly Tutorial - Step-by-Step Guide
A fundamental introduction to x86 assembly programming
RIP ROP: Intel's cunning plot to kill stack-hopping exploits at CPU level with "shadow stack" (June, 2016)
Introductory Intel x86: Architecture, Assembly, Applications - YouTube
Assembly Primer for Hackers (Part 1) System Organization Tutorial.mp4 - YouTube
ARM Exploitation: Return Oriented Programming on ARM (on Linux)
How to read arbitrary RAM with format string vulnerability
The best resources for learning exploit development -- MANY GOOD PROJECT IDEAS
Use The Debugger with Hopper Disassembler/Decompiler - YouTube

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Last Updated: 11-1-16