ASCF CTF

Hack. Learn. Compete. ASCF CTF is where curiosity meets cybersecurity.

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About ASCF

Welcome to ASCF: Asian Security and CTF Federation — the premier community for cybersecurity enthusiasts across Asia and beyond. We are dedicated to fostering talent, sharing knowledge, and hosting world-class Capture The Flag competitions.

Join us to test your skills across a wide range of security disciplines:

  • Web Security
  • Pwn & Binary Exploitation
  • Reverse Engineering
  • Cryptography
  • Digital Forensics
  • Miscellaneous

Latest News

CTF Update

Jan 30, 2026

Due to ongoing infrastructure changes, the CTF has been postponed. The competition will now take place next week. Thank you for your patience, we’re tuning the backend so the challenges hit just right ⚙️🏴‍☠️

Recent Joins

ny0h from Indonesia joined Mar 06, 2026
Monona joined Mar 04, 2026
ChaoS joined Mar 04, 2026
mym from China joined Mar 02, 2026
xuechengwen from China joined Feb 28, 2026
huanghewei from China joined Feb 27, 2026
ndyd from China joined Feb 27, 2026
shiva joined Feb 25, 2026
BabaYaga from India joined Feb 25, 2026
f4hr from Indonesia joined Feb 20, 2026

Competition Rules

  • General Conduct

    Be respectful to other participants. Sabotaging other teams or the infrastructure is strictly prohibited.

  • Team Collaboration

    Collaboration between different teams is not allowed. Sharing flags or solutions will result in disqualification.

  • No Brute Force

    Do not brute force the submission system or the challenges unless explicitly stated. Automated scanning is generally discouraged.

  • Flag Format

    Flags are typically in the format ASCF{...} unless otherwise specified in the challenge description.

Frequently Asked Questions

Once registered, you can either create a new team or join an existing one using a unique join code shared by your team captain.

We use dynamic scoring. Challenges start at a maximum point value and decrease as more teams solve them, rewarding those who solve difficult tasks early.

Please report any platform vulnerabilities or bugs to the administrators via the official Discord channel. Do not exploit them.

The competition is open to everyone interested in cybersecurity, from beginners to professionals.

Common tools include Burp Suite for Web, GDB or Ghidra for Pwn/Reverse, CyberChef for Crypto, and Wireshark for Forensics. A Linux environment (like Kali or Parrot) is highly recommended.

Prizes, if any, will be announced in the news section or on our official Discord. Some competitions are for learning and glory only!

Web: Exploiting web vulnerabilities. Crypto: Breaking ciphers. Pwn: Exploiting binary services. Rev: Reversing compiled code. Forensics: Investigating artifacts. Misc: Everything else!