We found an old server with some strange shell.
nc baby-thandbox.ecsc23.hack.cert.pl 5003
(defun echo () (princ "> ") (setq cmd (read)) (case cmd ('help (princ "Available commands:")(print "help")(print "flag")(print "quit")) ('flag (princ "you wish")) ('quit (quit)) (otherwise (prin1 cmd))) (terpri) (echo)) (handler-case (echo) (error (e) (prin1 e)(quit))) (quit)
Format flagi:
ecsc23{litery_cyfry_i_znaki_specjalne}
.
W razie wątpliwości lub pytań dotyczących konkursu zapraszamy na naszego Discorda: https://discord.gg/gAtRKa2rcn.