Forensics / Exploitation / Cryptography


Turkey is hosting a worldwide extraordinary contest. Within the Teknofest (teknofestistanbul.org) event, Turkish Technology Team (turkiyeteknolojitakimi.org) will be organizing HackIstanbul 2019 CTF contest. HackIstanbul 2019 CTF (Capture the Flag) contest will gather thousands of hackers from 132 countries worldwide to exhibit their skills. Hackers' skills will be pushed to the limits by advanced real life cyber-attack scenarios prepared under the guidance of world's foremost experts. The deadline to register for the contest is September 6th. Hackers who succeed in the preselection stage on September 4th, will gain access to enter the CTF challenge on September 9th. Every stage with different levels of difficulty and complexity will push the hackers to the limits while raising the excitement of the contest to the highest level. Hackers who reach September 6th will face 2nd preselection challenge; the 18 hour CTF challenge will carry only the best hackers to the final round. The top 10 teams who succeed the CTF will be invited to Istanbul for the grand final stage that will be hosted at Istanbul Atatürk Airport on September 22nd. The winning team will be awarded 10.000USD grand prize, while the 2nd best team will be awarded 6.000USD and the 3rd team will be awarded 3.000USD. The winners will get their prizes from The President of The Republic of Turkey Recep Tayyip Erdoğan.

If you aren't in over your head, how do you know how tall you are? 

T.S. Eliot

Greetings from Sector5! This project is built for fun and practice so I will try to keep it as simple as possible. hackistanbul is an international CTF Game project oriented for Turkey. Behind this project you will see a team with a never-ending passion for information security. We embrace softwares and cherish hardwares.

hackistanbul CTF is a playful game call to all you friends. We want to meet, collaborate and have fun with other infosec enthusiasts. hackistanbul aims to be one straightforward yet complex gaming experience for all you friends. Scroll down to learn more, and hopefully join us on this adventure.

Help us to make difference.
ISSA Turkey Chapter

Help us to make difference.
Anadolu Ajansı
Boğaziçi Üniversitesi
Gebze Teknik Üniversitesi

Help us to make difference.



Ali Taha Koç


Batuhan Tosun


Jay Bavisi


Keyaan Williams


Muhammed Yusuf Olca

The Grand National Assembly of Turkey

Yavuz Emir Beyribey

CTF categories

If a cluttered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign?

Albert Einstein
These challenges will create the foundational frame for the main picture on this adventure. Forensics is a branch of digital forensic science pertaining to evidence found in computers and digital storage media. The goal of
computer forensics is to examine digital media in a forensically sound manner with the aim of identifying, preserving, recovering, analyzing, and presenting facts and opinions about the relevant digital information.

It doesn’t matter how many times I have to click, as long as each click is a mindless, unambiguous choice.

Steve Krug
This section is all about getting the to the core. After you collect your information about the attackers, it is time for a payback. Challenges that can be used to learn about a variety of computer security issues such as
privilege escalation, vulnerability analysis, exploit development, debugging, reverse engineering, and general cyber security issues will be waiting for you under this category.

Never fall in love with an idea. They’re w*****. If the one you’re with isn’t doing the job, there’s always another.

Chip Kidd
Schrodinger's theory reads; if the door never opens, your reality may or may not alter into the form of a huge inconvenience for your team. Meanwhile the question of “if you can not see them, can you stop them” is also still very relevant. Certainly not my friends.
Then get ready for some cracking exercises. Cryptography is about constructing and analyzing various protocols which prevent the exposure of secrets to a third set of eyes. BTW, please do never forget that perceptive skills can sometimes take you even further.

All that is valuable in human society depends upon the opportunity for development accorded the individual.

Albert Einstein
Bring all your rapid and dirty solutions with you. Analyze the problem, pick your language, the weapon of your choice and start coding like never before. Utilize your ol' machine's
clock power and destroy all the obstacles one by one. Programming involves activities such as analysis, developing understanding, and generating algorithms in a target programming language

Photography is the simplest thing in the world, but it is incredibly complicated to make it really work.

Martin Parr
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Why join to HICTF 2019?


It looks like you have been improving your skills lately but are you ready for a test? Prepare to challenge your rivals on a "fun & friendly" cyber war game.


We know you can do it but it's a competitive world out there, so can you do it ASAP? See the battlefield, create your game plan, stay punctual, and never forget. Istanbul is a city of first come first serve.

Develop Solutions

Keep your favourite tools close my friend because things are going to get a lot warmer soon. A friendly advice; don’t forget to take 5 min naps for challenges of that kind.


One by one the clues will lead you to the nest but it is up to you what will happen next. D7 is confident that you will win this war but don’t slack around and hurry up ! Every minute counts.


Shine up your claws with the shattering shadow of your enemies. In the name of an ethical warfare, this cyber battlefield will honor all of its warriors, even the losers.


Maybe you already are one. Maybe you are on the virtual path to be one, but one thing is certain my friend and that is that CTF is the best place for building a strong network bonding experience within professional security perspectives.