Rules
- There is no team size limit.
- Do not share or post any flags, hints or solutions publicly during the CTF.
- Attacking event infrastructure (DoS / DDoS) is strictly prohibited.
- Cross-team collaboration is not allowed. Do not discuss challenges with members from other teams.
- Report all rule violations and infrastructure issues/vulnerabilities to the admins ASAP. Any violation of these rules will result in your team being disqualified.
- SekaiCTF Organizers reserve the right to disqualify a team if suspected for breaking the rules.
Prizes
The top two teams will earn qualification for the following onsite events:
- The 10th XCTF Finals in China (2026)
- MaltaCTF Finals in Valletta, Malta (2025)
※ The first-place team may choose their preferred event; second-place team will qualify for the other.
First Place (Worth $5,000)
- 2,000 USD
- 6× HTB 1-year VIP+ and 3-month Prolab Bundle
- 3× Binary Ninja Personal License
- Qualification for XCTF or MaltaCTF Finals
Second Place (Worth $3,000)
- 1,000 USD
- 6× HTB 1-year VIP+ and 1-month Prolab Bundle
- 2× Binary Ninja Personal License
- Qualification for XCTF or MaltaCTF Finals
Third Place (Worth $2,000)
- 500 USD
- 6× HTB 1-year VIP+
- 1× Binary Ninja Personal License
Blockchain Prizes
Every blockchain challenge will have the following bounty:
- 1st blood: 100 USDT
- 2nd blood: 50 USDT
- 3rd blood: 30 USDT
Writeup Prizes
- 8× 50 USD (2 reserved for blockchain challenges)
- 3× HTB 6-month VIP+
- 1× Binary Ninja Personal License (using binja)
Other Prizes
- First blood prize for speed pwn
- Bounties for "0-day" challenges