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Category: Misc
Solves (at time of writing): 1123
Description: Caesar caesar, on the wall, who is the fairest of them all?
We get a file called caesarmirror.txt we presumably have to decrypt.
The name of the challenge gives away that the used cipher is probably Caesar a.k.a. Rot13.
Decrypting the file with Cyberchef gets us this:
Oh boy! Wow, this warmup challenge sure os I !rehtegot tup ot nuf fo tol a saw
definitely absolutely always love trying sgniht evitavonni dna wen pu kniht ot
to do with the very basic, common and fo trap tsrif ehT !seuqinhcet FTC cissalc
your flag is flag{julius_ and that is a gnihtyreve ton si ti tub trats taerg
that you will need to solve this challenge. dna edih ot gniyrt ekil t'nod I
separate each part of the flag. The second od uoy tub _a_ni_ si galf eht fo trap
need just a little bit more. What exactly ekam dna yrt ot ereh edulcni ew dluohs
this filler text look more engaging and ?senilwen dda ew dluohS ?elihwhtrow
Should we add spaces and try and make it hguone si senil ynam woH ?lacirtemmys
to make this filler text look believable? A a nihtiw srettel fo erauqs dilos
simple, monospace-font text file looks good eht ta tsomla ew erA .em ot hguone
end? It looks like it! I hope it is good. }noitcelfer si galf ruoy fo trap driht ehT
and at this point you should have everything rof galf siht timbus ot deen uoy taht
points. The beginning is marked with the ,ecarb ylruc gninepo eht dna xiferp galf
and it includes English words separated by ylruc gnisolc a ni dne ot ,serocsrednu
brace. Wow! Now THAT is a CTF! Who knew we siht ot rehpic raseac eht klim dluoc
extent?? Someone get that Julius !ladem a yug raseaC
Almost what we want, but the second side is mirrored.
Because I was too lazy to mirror it I just read the text backwards, resulting in flag{julius_in_a_reflection}
~sw1tchbl4d3, 31/07/2020 (dd/mm/yyyy)