DownUnderCTF 2025


CTF Archive.

DownUnderCTF 2025

DownUnderCTF is the largest online Australia and Aotearoa (NZ) run Capture The Flag (CTF) competition. This CTF aims to up-skill the next generation of Cyber Security Professionals and to grow the CTF community in the AUNZ region. DownUnderCTF is a completely free online event open to all participants around the world. Prize eligibility is restricted to Australian and Aotearoa (NZ) Secondary or Tertiary school students to encourage collaboration and healthy competitive spirit between the nations whilst also promoting cybersecurity skills to students.

With over 4600+ players and 2100+ teams in 2024 from complete beginners to seasoned CTF veterans, our diverse community is strong and we hope you can join us for 2025!

Original Date: Fri, 11 July 2025, 17:00 UTC — Sun, 13 July 2025, 17:00 UTC
Original URL: https://2025.duc.tf/
CTFtime Entry: DownUnderCTF 2025
Organizing Team: DownUnderCTF



Challenges

send me your best fake snake object

Author: joseph

Connect with SSH

Link your SSH key, then connect with: ssh [email protected]

a read and a write, what more could you ask for?

Author: joseph

Connect with SSH

Link your SSH key, then connect with: ssh [email protected]

It's time to really push the envelope and go above and beyond! We've got a new challenge for you. Can you find a way to get into our email server?

Author: Blue Alder

Connect with SSH

Link your SSH key, then connect with: ssh [email protected]

Yet another login task... Authenticate as admin to get the flag!

Author: joseph

Connect with SSH

Link your SSH key, then connect with: ssh [email protected]

I will happily give you the flag... if you can sign my challenge!

Author: cybears:cipher

Connect with SSH

Link your SSH key, then connect with: ssh [email protected]

Just like how the author confused chrysalides for cocoons, I always get the title of this book confused.

Author: wednesday

Connect with SSH

Link your SSH key, then connect with: ssh [email protected]

it's 4pm on a school afternoon. you just got home, tossed your bag on the floor, and turned on ABC3. it's time.. for GGSP

Author: wednesday

Connect with SSH

Link your SSH key, then connect with: ssh [email protected]

You should only need a short amount of time to break this short hash RSA signature scheme!

Author: joseph

Connect with SSH

Link your SSH key, then connect with: ssh [email protected]

30-Day Scoreboard:

This scoreboard reflects solves for challenges in this module after the module launched in this dojo.

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