CTF ORION
বাংলা
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About CTF ORION

A free place to learn security by doing it: short lessons, practice challenges, optional events and teams.

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Numbers

2Players
0Published lessons
0Challenges
0Teams

Our story

CTF ORION started on 26 October 2023 as a small site called CTF Kalpurush, written by Unkn0wn2603. It was an expression of a hope: that hackers in Bangladesh would have a place of their own to practise, learn and grow.

The idea was inspired by EvilZone.org and Biplobi CTF. Both were places where people learned from each other for free, and neither is online today. CTF ORION carries that spirit forward.

Why it is free

We do not want to take money from learners. Paid platforms such as TryHackMe charge beginners a lot just to learn the basics, and that shuts out many people who need it most.

So CTF ORION is a free community: for anyone who wants to learn, and for anyone who wants to teach. Learning stays open, always.

What is here

Four parts that work on their own or together.

Learning paths

Short lessons in order. Foundations starts from no background; the other paths go deeper into one category each.

Open the paths

Challenges

File-based puzzles in cryptography, forensics, reverse engineering, OSINT, steganography and misc. Each one has a flag in the form CTF_ORION{...}.

See the challenges

Events

Timed competitions with their own scoreboard. In events every team gets its own copy of each flag, so sharing can be traced.

Upcoming events

Teams

Play alone or in a team of up to 25. Team and solo boards are kept separate.

Browse teams

How it works

From sign-up to your first flag.

  1. Make an account

    A username, an email and a password. Reading lessons does not need one; submitting flags does.

  2. Learn the basics

    Work through Foundations, or jump to the path of the category you like.

  3. Solve and submit

    Download the files, find the flag, paste it on the challenge page. Points follow the level: 100 for Beginner up to 500 for Insane.

  4. Join a team or an event

    Create a team with a join code, register for an event, and compete on its scoreboard.

Who it is for

  • People starting out who want a clear order to learn things in.
  • Players who want practice challenges and a scoreboard.
  • Teachers who want to share lessons and challenges. Content is reviewed before it goes live.
  • Clubs and communities that want to run their own event.

Who runs it

CTF ORION is a product of QudsLab. Sign-in protection and abuse detection use TracePrint, another QudsLab product. The admin team reviews teaching content, hosting proposals and fair-play cases.

Questions, ideas and bug reports are welcome on the contact page. Rules for players are on the fair play page.

More

Help and FAQAccounts, flags, teams, events ChangelogWhat changed and when StatusIs everything running? Privacy policyWhat we store and why