Magnet Virtual Summit 2020 CTF — Egg Hunt

Magnet Virtual Summit 2020 CTF

Quit ROMAN around and find the ONE egg

What is the color of the first egg?

A: BLUE

Zpv ibwf gpvoe uif CMVF fhh! Uif ofyu qjfdf pg uif qvaamf jt: Mci vojs tcibr hvs UFSSB suu (gsqfsh kcfr = Cbwcb)… hvs bslh dwsqs ct hvs dinnzs wg : KK91WUvvraIuNa91paEurUvzWS9GEI5VFGPzN2qiZw4urUvzWU5zsVEuqUzzM2Iup2MurUvzWVP1sbdgNGPdqmOco2J5WR0upKTbpaJ0YHcYo29vWVJzp3SuNbJcqbquNavfWUJdrmPlN20iZw4uN2l4WVdzNUqurUXlM2guMacupLFzWVNcNVB4NGPjNxcYMaJ5rU9ho2SvWU5gpQPcqVz5rmPhNbcupLvjM2zlWU9arQ4iZwPhNbcupaT6swPzpRcuqav6qkcY

The “Roman” keyword suggests its likely using caesar cipher, and “One” suggests the shift size.

You have found the BLUE egg! The next piece of the puzzle is: Lbh unir sbhaq gur TERRA rtt (frperg jbeq = Bavba)… gur arkg cvrpr bs gur chmmyr vf : JJ91VTuuqzHtMz91ozDtqTuyVR9FDH5UEFOyM2phYv4tqTuyVT5yrUDtpTyyL2Hto2LtqTuyVUO1racfMFOcplNbn2I5VQ0toJSaozI0XGbXn29uVUIyo3RtMaIbpaptMzueVTIcqlOkM20hYv4tM2k4VUcyMTptqTWkL2ftLzbtoKEyVUMbMUA4MFOiMwbXLzI5qT9gn2RuVT5foPObpUy5qlOgMabtoKuiL2ykVT9zqP4hYvOgMabtozS6rvOyoQbtpzu6pjbX

Last one there is a ROTten egg

What is the special word?

A: Onion

The next clue is ROT, so we will decipher it with ROT13.

You have found the GREEN egg (secret word = Onion)… the next piece of the puzzle is : WW91IGhhdmUgZm91bmQgdGhlIE9SQU5HRSBlZ2cuLi4gdGhlIG5leHQgcGllY2Ugb2YgdGhlIHB1enpsZSBpcyAoa2V5ID0gbWFnbmV0KToKa29hIHVlb3EgZnVocncgZmhrIGVpdyBxZ20uLi4gZ2x4IHplZGcgdGJxY2sgYmogbXRlIHZoZHN4ZSBvZjoKYmV5dG9ta2EhIG5sbCBocHl5dyBtZnogbXhvY2lxIG9mdC4uLiBtZnogbmF6eiBlbDogcmh6cwoK

Probably the most baseline egg

How is the Orange Egg encoded?

A: base64

The hint for this one is baseline.

You have found the ORANGE egg… the next piece of the puzzle is (key = magnet):
koa ueoq fuhrw fhk eiw qgm… glx zedg tbqck bj mte vhdsxe of:
beytomka! nll hpyyw mfz mxociq oft… mfz nazz el: rhzs

Opposites Attract

What was the key used to unlock this cipher?

A: magnet

This part was using the vigenere cipher that requires a keyword to encode or decode the text.

you have found the red egg… the next piece of the puzzle is:
xlmtizgh! blf ulfmw gsv tlowvm vtt… gsv uozt rh: yvzm

Hey coach, I’m going to need a SUB

What is the final message of the completed egg hunt?

A: bean

Using the ciphertext alphabet: zyxwvutsrqponmlkjihgfedcba

This means you replace a with z, b with y, c with x etc…

congrats! you found the golden egg… the flag is: bean

That’s it for this fun and quick section: