Mystery (Huntress CTF 2024)

By: yukna on
CTFComSecCyberSecurityWrite-upHuntressHuntress-CTF-2024

Author: Michael Orlino

Someone sent this to me… such enigma, such mystery:

rkenr wozec gtrfl obbur bfgma fkgyq ctkvq zeucz hlvwx yyzat zbvns kgyyd sthmi vsifc ovexl zzdqv slyir nwqoj igxuu kdqgr fdbbd njppc mujyy wwcoy

Settings as below:

  • 3 Rotor Model
  • Rotor 1: VI, Initial: A, Ring A
  • Rotor 2: I, Initial: Q, Ring A
  • Rotor 3: III, Initial L, Ring A
  • Reflector: UKW B
  • Plugboard: BQ CR DI EJ KW MT OS PX UZ GH

Seems like the Enigma machine used in World War 2. Anyways, using cryptii, the settings by default were already set. The result reads:

message wrapped in light hidden deeper out of sight locking it more tight anyway your flag is here flag <32CHARACTERS>zzz

The zzz at the end did throw me off, having to manually count again and again to realise that it is probably padding.