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DEF CON Hacking Conference

CTF Archive

Image of DEF CON logo pirate flag.

This page is devoted to collecting accounts, walk throughs and other resources of Capture the Flag at DEF CON over the years, not only for history's sake but so the uninformed can better grasp the epic journey that teams must face on the road to CTF victory!

If you know of a resource that should be included on this page, feel free to pass it along to neil ]at[ defcon [dot] org.

DEF CON 21 Capture the Flag Pcaps, Binaries and Tools

Binaries and Tools: Torrent Torrent Logo

Friday Packet Captures: Torrent Torrent Logo
Saturday Packet Captures: Coming Soon!
Sunday Packet Captures: Coming Soon!

DEF CON 21 Capture the Flag Write-ups

CNBC Article - Cyberteams duke it out in the World Series of Hacking

LegitBS Blog - Final Writeup:

LegitBS Blog - Public Handout:

Routards Team Blog - Defcon 21 CTF:

Routards Team Blog - Defcon 21 CTF - Binaries and environment:

DEF CON 21 Quals Write-ups

If you'd like to re-live some of the excitement from the quals, you can check out a few of these write-ups from around the internetosphere:

Team Alternatives:

X-N2O's Blog:

Stalkr's Blog:

Blue Lotus:

Leet More CTF Team Blog:

Here's a great collection of write-ups:

DEF CON 20 Capture the Flag Write-ups

The Awesome Reddit Ask Me Anything thread from Samurai CTF

From the Routards Team Blog

Wireshark goodness from the NYU Poly ISIS Lab

Wireshark Exploit writeup from 0xDEADBEEF

From the SiBears Blog

Bonus writeup for those who can read Russian:

Results announcement for CTF at DEF CON 20 - YouTube

DEF CON 20 Capture the Flag Quals Write-ups

DC 20 Quals Writeups:

Quals Graph:

DDTek Quals Scoreboard

Defcon 20 - Quals Writeup Collection from CTF Central
Links below are from the above link.












binary l33tness










grab bag




Writeups Collection:

Quals files dumps:

urandom 200:

urandom 400:

DEF CON 19 Capture the Flag Write-ups

Plaid Parliament of Pwning write up

Routards Blog

DEF CON 19 Capture the Flag Quals Write-ups

Challenge repository at

Several write-ups at

Binary 100 (Espanol)

Forensics 100

Forensics 300

Grab Bag 100

Grab Bag 200 (Espanol)

Retro Revisited 300

Retro Revisited 500

Potent Pwnables 300

DEF CON 18 Capture the Flag Quals Wrap-up

Unofficial Results from DEF CON 18 CTF Quals:

Video - pwning binary 300 at DEF CON 18 CTF quals:

Write-ups for DEFCON 18 CTF Quals, including Trivia 500, Packet Madness 200, Binary L33tness 300, Pwtent Pwnables 200, Forensics 100, Forensics 400, and Forensics 500, and more to come:

PT400 Walkthrough:

Pwtent Pwnables 200 Write Up:

Packet 100 Write Up:

Forensics 200 Write Up

Crypto 400 Write Up: Team: gn00bz

Defcon ctf quals trivia 500 music remix version volume up plz!! from wowhacker

French Language Write Up: (en fran├žais)