Dhiraj Mishra, Zubin Devnani - Deep Dive into Fuzzing - DCTLV2025

Name of Training: Deep Dive into Fuzzing
Trainer(s): Dhiraj Mishra and Zubin Devnani
Dates: August 11-12, 2025
Time: 8:00 am to 5:00 pm PT
Venue: Las Vegas Convention Center
Cost: $1700

Course Description: 

Fuzzing is a technique of identifying software vulnerabilities by automated corpus generation. It has produced immense results and attracted a lot of visibility from security researchers and professionals in the industry, today fuzzing can be utilized in various ways which can be incorporated into your secure SDLC to discover vulnerabilities in advance and fix them. Attendees will be emulating techniques which will provide a comprehensive understanding of "Crash, Detect & Triage" of fuzzed binaries or software. In "Deep dive into fuzzing" we will be covering a detailed overview of fuzzing and how it can be beneficial to professionals in uncovering security vulnerabilities with a hands-on approach through focus on labs.

Finding vulnerabilities in software requires in-depth knowledge of different technology stacks. Modern day softwares have a huge codebase and may contain vulnerabilities, manually verifying such vulnerabilities is a tedious task and may not be possible in all cases. This training is designed in such a way that it introduces the concept of fuzzing and vulnerability discovery in software’s covering multiple platforms such as Linux & Windows and triage analysis for those vulnerabilities.

Course Outline: 

Day 1

• Understanding fuzzing fundamentals

• AFL Internals

• Setting up the environment

• Selecting fuzzing targets

• Spinning up the fuzzer effectively

• Corpus generation

• Address/Memory Sanitizers

• Hooking custom mutators

• “Not so pro tips” while fuzzing

• Parallel fuzzing

• Improving code coverage with grammar

• Plotting difference in code coverage

• Enhancing your fuzzing approach

• Symbolic execution fuzzing
  

Day 2

• Setting up persistent mode

• Introduction to QEMU

• AFL internals for QEMU

• Targeting blackbox binaries

• Introduction to ARM

• Cross-platform architecture fuzzing

• Setting up QEMU persistent

• Introduction to network fuzzing

• WinAFL Internals

• Analyzing your target with debuggers

• Improving code coverage

• Fuzzing browser engines and SSL libraries

• Overview of different fuzzing frameworks

• Integrating slack with fuzzing stats

• Capture the crash

Key Takeaways

• Effective ways of fuzzing

• Understanding the different class of vulnerabilities

• Key fundamentals of fuzzing and how it works

• Creating your own grammar for fuzzing

• Implementing persistence for complex programs

• Utilizing QEMU for binary only fuzzing

• Introduction to ARM and fuzzing ARM binaries

• Getting started with fuzzing windows binaries

• Tons of exercises focusing on real world software’s

• CTC – Capture the crash on a custom application

Difficulty Level:

Beginner-Intermediate

Suggested Prerequisites:

• Linux & Windows fundamentals 

• Basic understanding of C/C++

What Students Should Bring: 

Attendees are required to have a system with root/admin privilege with minimum 8GB RAM and 100 GB disk space with VirtualBox or VMware installed.

Trainer(s) Bio:

Dhiraj Mishra is an active speaker who has discovered multiple zero-days in modern web browsers and an open-source contributor. He is a trainer at Blackhat, BruCON, 44CON and presented in conferences such as Ekoparty, NorthSec, Hacktivity, PHDays, Hack in Paris & HITB. In his free time, he blogs at www.inputzero.io/www.fuzzing.at and tweets on @RandomDhiraj.

Zubin Devnani is a red teamer by trade, who has identified multiple vulnerabilities in commonly used software. He is a trainer at Blackhat and has delivered multiple workshops, including PHDays and Hacktivity. Utilizes his fuzzing skills in his day to day trade to identify new ways of breaking into enterprises! Blogging at devtty0.io and tweets on @p1ngfl0yd.

Registration Terms and Conditions: 

Trainings are refundable before July 8, 2025, minus a non-refundable processing fee of $250.

Trainings are non-refundable after July 8, 2025.

Training tickets may be transferred. Please email us at training@defcon.org for specifics.

If a training does not reach the minimum registration requirement, it may be cancelled. In the event the training you choose is cancelled, you will be provided the option of receiving a full refund or transferring to another training (subject to availability).

Failure to attend the training without prior written notification, will be considered a no-show. No refund will be given.

By purchasing this ticket you agree to abide by the DEF CON Training Code of Conduct and the registration terms and conditions listed above.

Several breaks will be included throughout the day. Please note that food is not included.

All courses come with a certificate of completion, contingent upon attendance at all course sessions.