IERAE CTF 2025

IERAE CTF is the CTF organized by ierae, the CTF team of GMO Cybersecurity by Ierae, Inc.
GMO Cybersecurity by Ierae, Inc. is a Japanese security company with many CTF players. We have been helped by and grown with those CTF players, and now we want to help energize the community.

1^st Place

300,000 JPY

2^nd Place

150,000 JPY

3^rd Place

50,000 JPY

※ Amounts are pre-tax. Foreign recipients of the prize money are subject to source withholding tax rate of 20.42%.

For Japanese teams consisting only of students, the top of which will receive

• 2 OffSec Training licenses
• 2 CODE BLUE 2025 tickets
  
  

Please make sure you select the correct option when registering account.

• This is a team competition.
• There is no limit to the number of people in one team. Of course you can participate alone though.
• The flag format is IERAE{something}, unless otherwise specified.
• Players need to submit a flag to the score server in order to get points.
• A team that gets more score, ranks higher. If some teams get the same score, a team that made the last submission of a valid flag earlier, ranks higher among them.
• If there arise situations which are not covered by these rules, the organizers may make decisions on them as needed. The decisions made are absolute.

If you take the following actions, you will be disqualified.

1. To attack or disturb other teams
2. To attack servers unrelated to problems
3. To share flags or hints with other teams
4. To try brute-force attacks to problem servers