Welcome to X-CTF 2016!

X-CTF 2016 is a cyber security competition by NUS Greyhats that will be held in NUS School of Computing (SoC) on 18th June 2016. In the competition, student teams from various tertiary institutions will compete to solve challenges which are set by an independent body.



Announcement #1

We are aware that all local Polytechnics will be holding their Graduation Ceremony in May 2016, and after internal discussions, we've agreed that Polytechnic students whom are graduating in the year of 2016 shall be allowed to participate in the X-CTF finals. We apologize for the change in the regulations.

Announcement #2

Dear All Participants,

Thank you so much for participating in the X-CTF Online Qualifiers held from 9 April 2016 to 10 April 2016. Everyone has done extremely well and we are grateful that you have devoted your time over the weekend.

The following institutions have no representative:
1) Republic Polytechnic (RP)
2) Singapore Institute of Technology (SIT)
3) Singapore Institute of Management (SIM)

As there are no teams representing the aforementioned institutions, their slots have automatically been forfeited. Thus, we have decided to increase the limit of teams per school to 3 but maintain the 22 slots pre-allocated for the Finals.

It is our pleasure to present the qualifying teams (in alphabetical order):

School Team Name Points in Qualifiers
Nanyang Polytechnic (NYP) DLAN 86 Points
Missing 8 Points
[email protected]$had3s 3 Points
Nanyang Technological University (NTU) 0x0ffff5ec 204 Points
1x0ffff5ec 127 Points
2x0ffff5ec 102 Points
National University of Singapore (NUS) Xiia0F1aGGer$ 229 Points
Never Gonna Give 219 Points
Ω' 194 Points
Ngee Ann Polytechnic (NP) Gandalf the Hacker 72 Points
Ultimate Novices 31 Points
J-NEX 7 Points
Others FengShui (RJC) 143 Points
Singapore Management University (SMU) Whitehats 194 Points
Black Cats 38 Points
Singapore Polytechnic (SP) 小笼包 199 Points
Burden Overflow 162 Points
.append(0); 143 Points
Singapore University of Technology and Design
Kopipacket-Jr 43 Points
Temasek Polytechnic (TP) Axiom 93 Points
asdfghjkl 57 Points
Team Doughnut 52 Points

We will be contacting the teams who have qualified separately with the details for the Finals.

Thank you.

Best regards,
NUS Greyhats

Competition Details

This competition is open to all students from tertiary institutions in Singapore. Participants are required to form a team of four to take part in the competition.
Teams will then have to participate in the online qualifiers and only the top two teams from each institution (based on scores) will be selected to participate in the final competition. There will be a total of 88 students from 11 institutions competing in the final competition.

The final competition will take place on-site at NUS School of Computing Seminar Room 1.

Participants are required to bring and utilize their own laptop(s) and equipment(s) for any activity/competition.

Qualifiers Details

The qualifiers for X-CTF will begin from 9th April 2016 0000 hrs until 10th April 2016 2359 hrs, lasting 48 hours in total.

More details will be released through e-mail at a later date.

So what exactly is X-CTF?

"X-CTF" stands for "Cross Varsity - Capture The Flag" competition. It is a cyber security competition organized annually where teams from the tertiary institutions are welcome to participate. The competition will be held for a duration of eight hours and each team will be given a set of challenges to solve in order to retrieve a "flag". A correct flag grants points upon submission and the team with the highest amount of points will be crowned the champion.

Rules of X-CTF

During the CTF,

  • Do not attack the PCs of other competitors.
  • Do not attack the PCs of other competitors.
  • Do not attack the scoring server.
  • Do not attack anything outside of the CTF environment.
  • Do not delete or modify flags.
  • ARP poisoning or any form of man-in-the-middle attack is prohibited. This action is subject to disqualification.
  • Sharing flags or solutions is prohibited. This action is subject to disqualification.
  • Brute-forcing flags will not be tolerated.
  • Denial of service attacks on any challenge will not be tolerated, unless the challenge calls for such an attack.
  • If you find any bug in the system, let us know. We might give you some bonus points.
  • Organizers' decision is final.
  • Timeline of Event

    Date Event
    08/04/2016 (Fri) Registration Closes
    09/04/2016, 0000hrs (Sat) Start of Qualifiers
    10/04/2016, 2359hrs (Sun) Closing of Qualifiers
    11/04/2016 (Mon) Announcement of Qualifiers Result
    18/06/2016 (Sat) X-CTF 2016

    Competition Day

    So what happens on the actual X-CTF? Below is an overview of the entire event.

    Time Programme
    0830hrs - 0900hrs Registration
    0900hrs - 0930hrs Welcome Address and Competition Briefing
    0930hrs - 1730hrs X-CTF Competition*
    1730hrs - 1800hrs Tea Break & Networking
    1800hrs - 1830hrs Results Announcement & Prize Presentation
    1830hrs End of Programme

    1. Lunch will be catered and will be served at 1200hrs. Participants will be informed of arrival of food and are to consume it at their own discretion within the recommended safe for consumption period.

    2. Venue of Competition: X-CTF is expected to be held at NUS SoC Seminar Room 1. Details may be updated periodically.


    And the section you are eagerly waiting for... PRIZES!

    Standings Prizes
    1st Place Challenge Trophy + SGD $4,000 cash
    2nd Place SGD $2,000 cash
    Third Place SGD $1,000 cash


    Platinum Sponsor

    Vantage Point Security Pte. Ltd.

    Gold Sponsors

    Bank of America Merrill Lynch Cyber Security Agency Cyber Test Systems

    About the Organisers

    X-CTF 2016 is organised by NUS Greyhats. NUS Greyhats is a special interest group designed to spark students’ interest in information security and advance the level of security proficiency towards the aim of contributing to the growing need for cyber defenders in the government and private sectors.

    NUS Greyhats is a special interest group under the School of Computing, National University of Singapore.

    Contact Us

    You can find out more about NUS Greyhats here. If you have any enquiries or requests, feel free to email us.

    School of Computing