Magic Bytes & Security: When file categorisation goes wrong [Capture The Flag Fundamentals]

When presented with an unknown data blob, what process is followed for an application to determine that files type? What are the security concerns associated with this process?
In this video we are going to explore how data blobs are classified as files and some common Capture The Flag (CTF) and penetration testing tricks related to this classification process across Extension, Media type, Structure and Magic bytes.
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[@247CTF]

💣💣💣 Guarantee it's impossible to have too many explosions in a security video 💣💣💣

[@madhureshminoshi4272]

Hey i am a beginner and i am learning c now . Where should i go from there ? thank you :) . NIce video . Will wait for begineer level videos :)

[@247CTF]

Will release some easier (and also more difficult) videos in the future, stay tuned!

[@zerosploit]

Wow i did this a different way im going to try it this way now thanks again mate

[@247CTF]

No problem 👍

[@ctfs09]

Can yo explain your way? Any writeups or reference?

[@zerosploit]

@@ctfs09 sorry no writeups i just do these ctfs for fun on my down time

[@maxrinehart4177]

Thank you so much dude, keep up the good work.

[@budimirfilipovic8442]

Nice video, keep up the good work!!!

[@247CTF]

Thanks, will do!

[@joyboy973]

Some day, this channel and the website will be huge

[@247CTF]

Hope so, thanks!

[@noob-zr2mg]

Thank you!! keep up the good work

[@247CTF]

Thanks, will do!

[@yashgupta8000]

So the most secure way is to use magic bytes?

[@247CTF]

Depends what you want to do, but generally make sure you are using the correct comparison type.

[@harrywang3098]

I am too stupid to separate the jokes from the useful stuff. Too much going before my eyes. :(

[@247CTF]

Let me know if anything in particular has you stumped!