SekaiCTF returns for its fourth edition! While the overall difficulty has been designed to suit intermediate and advanced participants, we've also included beginner-friendly tasks to ensure newer players can join in and enjoy the experience.

SekaiCTF 2025 will serve as dual prequalifier for MaltaCTF 2025 Finals and the 10th XCTF Finals.

Discord: https://discord.gg/6gk7jhCgGX

[+] Prize Pool
・USD $4,000 in cash and over $10,000 worth of prizes
・The top two teams will earn qualification for the following onsite events:
​ ​ ​ ​ ​ ​ ​ ​・The 10th XCTF Finals in China (2026): https://adworld.xctf.org.cn/
​ ​ ​ ​ ​ ​ ​ ​・The inaugural MaltaCTF Finals in Valletta, Malta (2025): https://2025.ctf.mt/
​ ​ ​ ​ ​ ​ ​ ​※ The first-place team may choose their preferred event; the second-place team will qualify for the other.

[+] Sponsors
・OtterSec (https://osec.io/)
・Trail of Bits (https://www.trailofbits.com/)
・Sec3 (https://www.sec3.dev/)
・Vector 35 / Binary Ninja (https://binary.ninja/)
・Hack The Box (https://www.hackthebox.com/)

[+] Partners
・Google Cloud (https://cloud.google.com/)
・XCTF League
・Friendly Maltese Citizens

[+] 1st Place (Worth $4,000)
・1,039 USD
・6x Hack The Box 1-year VIP+ and 6x 3-month Prolab Bundle
・3x Binary Ninja Personal License
・Qualification for XCTF or MaltaCTF Finals

[+] 2nd Place (Worth $2,600)
・539 USD
・6x Hack The Box 1-year VIP+ and 6x 1-month Prolab Bundle
・2x Binary Ninja Personal License
・Qualification for XCTF or MaltaCTF Finals

[+] 3rd Place (Worth $1,800)
・339 USD
・6x Hack The Box 1-year VIP+
・1x Binary Ninja Personal License

[+] 4th Place
・239 USD

[+] 5th Place
・139 USD

[+] Each of the four blockchain challenges has the following bounty:
・1st blood: 100 USDT
・2nd blood: 50 USDT
・3rd blood: 30 USDT

[+] Writeup prizes
・8x 50 USD (2 reserved for blockchain challenges)
・3x Hack The Box 6-month VIP+
・1x Binary Ninja Personal License using Binja for writeup

[+] Others
・First blood prize for speed pwn
・Random merch (Sekai stickers, Miku toys, Vocaloid badges, figures etc.) for first bloods
・Additional bounties for "0-day" challenges

Interested teams

24 teams total

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