$ ctf -h

Grey Cat The Flag is a CTF hosted by NUS Greyhats in collaboration with National Cybersecurity R&D Labs.

What is CTF?

CTF (Capture The Flag) is a kind of information security competition that challenges you to solve a variety of tasks ranging from a scavenger hunt on wikipedia to basic programming exercises, to hacking your way into a server to steal data. In these challenges, the contestant is usually asked to find a specific piece of text that may be hidden on the server or behind a webpage. This goal is called the flag, hence the name!

If you are new, don’t worry! We will be sharing resources in our Discord server every now and then.

Learn more about CTFs

$ stat ctf

This CTF is open to all students studying in Singapore (Sec/JC/Poly/Uni) + NSFs. International teams are also welcomed! However, only local students & NSFs can qualify for the in-person final round to get our prizes.

Local teams who wish to be eligible for the finals must sign up here with a maximum team size of 3.

International or casual teams can sign up on the CTF platform during the event itself. For fairness, please also play in teams of 3.

$ where ctf

6 Jun, 8pm (GMT+8) to
10 Jun, 8pm (GMT+8)
Qualifiers, Online
18 to 19 Jun (begins at 9am)Finals* @ Innovation 4.0

*Subject to COVID-19 restrictions (situation is looking good now 😃)

$ man prize

Only local teams are eligible for prizes.

$ ls qualifiers

Top 10 Writeups 📝
(for specific challenges)
$50 each
First Bloods 🩸
(for 10 specific challenges)
$50 each

$ ls finals

Top 10 teams from the qualifiers will compete in the in-person finals.

Champion 🏆$9000
2nd 🥈$6000
3rd 🥉$3000
4th-10th 🙂$450 each

$ whois sponsors

We would like to extend our heartfelt gratitude to our sponsors .

Platinum Sponsor: Cyber Security Agency of Singapore

Gold Sponsors: GuardRails, Ensign InfoSecurity


Join our Discord server if you have more questions.

Q: I don't have a team of 3. Can I still join?

A: You can join our Discord server to find teammates.

Q: If my team has a member that is not studying in Singapore/awaiting enlistment/pending matriculation, are we still eligible for prizes?

A: No :(

Q: How do I know if I have successfully registered my team?

A: We will send out confirmation emails in batches, so it might take some time for you to receive it. If you have yet to receive the email and wish to find out immediately, you can file a ticket in #🛠-support in our Discord server and we will help you check manually.

Q: What categories are there?

A: Web, Pwn, Crypto, RE, Misc

Q: Is this CTF beginner friendly?

A: Yes! But we also have hard challenges for the stronger teams.

Q: What's the flag format?

A: grey{...}

$ cat poster.png