[Bugs_Bunny CTF 2017] ZERO-ONE !

Programation 45점짜리 문제다.

ZERO ONE ZERO ONE ZERO ZERO ZERO ONE ZERO ONE ONE ZERO ONE ONE ONE ZERO ZERO ONE ZERO ONE ZERO ONE ONE ZERO ZERO ONE ONE ZERO ONE ONE ONE ZERO ZERO ONE ONE ZERO ZERO ZERO ONE ONE ZERO ZERO ONE ONE ZERO ZERO ZERO ONE ZERO ZERO ONE ONE ONE ZERO ZERO ONE ZERO ONE ZERO ZERO ZERO ZERO ONE ONE ZERO ONE ONE ZERO ZERO ONE ZERO ZERO ZERO ONE ZERO ONE ZERO ONE ONE ONE ZERO ZERO ONE ONE ZERO ONE ZERO ONE ZERO ONE ONE ONE ZERO ONE ZERO ONE ZERO ONE ONE ZERO ZERO ONE ZERO ONE ZERO ONE ZERO ONE ONE ZERO ZERO ZERO ZERO ONE ONE ONE ZERO ZERO ONE ONE ZERO ONE ONE ONE ZERO ONE ONE ONE ZERO ONE ZERO ZERO ONE ONE ONE ZERO ZERO ONE ZERO ONE ZERO ONE ONE ONE ZERO ONE ZERO ONE ONE ZERO ONE ZERO ZERO ONE ONE ZERO ONE ONE ZERO ZERO ZERO ONE ZERO ZERO ONE ONE ONE ONE ZERO ONE ZERO ZERO ZERO ONE ZERO ZERO ZERO ONE ZERO ZERO ONE ZERO ZERO ONE ZERO ONE ONE ONE ONE ZERO ONE ZERO ZERO ONE ZERO ZERO ONE ONE ONE ONE ZERO ONE ZERO ZERO ZERO ONE ONE ONE ZERO ONE ZERO ZERO ONE ONE ONE ZERO ZERO ONE ONE ZERO ONE ONE ZERO ONE ZERO ONE ZERO ONE ONE ZERO ONE ZERO ZERO ONE ZERO ONE ZERO ONE ONE ONE ZERO ONE ZERO ONE ZERO ONE ZERO ONE ZERO ONE ONE ONE ONE ZERO ZERO ZERO ZERO ONE ZERO ONE ONE ZERO ONE ZERO ZERO ONE ZERO ONE ZERO ONE ZERO ZERO ZERO ONE ZERO ONE ZERO ONE ONE ZERO ZERO ONE ONE ZERO ONE ONE ZERO ONE ZERO ONE ZERO ZERO ONE ONE ZERO ONE ZERO ONE ZERO ZERO ZERO ONE ZERO ZERO ZERO ONE ZERO ONE ZERO ZERO ONE ZERO ZERO ONE ONE ZERO ONE ZERO ZERO ONE ZERO ONE ZERO ZERO ONE ONE ONE ZERO ZERO ONE ONE ZERO ONE ZERO ONE ZERO ZERO ONE ZERO ONE ZERO ONE ZERO ONE ZERO ONE ONE ONE ONE ZERO ONE ZERO ZERO ONE ZERO ZERO ONE ONE ZERO ONE ZERO ONE ONE ONE ONE ZERO ONE ZERO ZERO ONE ONE ZERO ONE ONE ZERO ZERO ZERO ONE ONE ZERO ONE ZERO ZERO ONE ZERO ONE ZERO ONE ONE ZERO ONE ZERO ZERO ONE ZERO ONE ZERO ONE ONE ONE ZERO ONE ZERO ZERO ZERO ONE ZERO ONE ZERO ZERO ONE ONE ZERO ZERO ZERO ZERO ZERO ONE ZERO ONE ONE ZERO ONE ZERO ZERO ONE ONE ZERO ONE ONE ZERO ONE ZERO ONE ZERO ONE ZERO ONE ONE ZERO ZERO ONE ONE ZERO ONE ZERO ONE ONE ZERO ONE ZERO ZERO ONE ONE ZERO ONE ZERO ONE ONE ZERO ONE ONE ONE ZERO ZERO ZERO ONE ONE ZERO ZERO ZERO ZERO ZERO ZERO ONE ONE ONE ONE ZERO ONE

ONE 과 ZERO 로만 이루어져 있다. 

한글 프로그램의 찾아 바꾸기 기능을 이용하여 ZERO는 0으로, ONE은 1로 바꾸고 띄어쓰기를 없애주면 다음과 같이 된다.

010100010110111001010110011011100110001100110001001110010100001101100100010101110011010101110101011001010101100001110011011101110100111001010111010110100110110001001111010001000100100101111010010011110100011101001110011011010101101001010111010101010111100001011010010101000101011001101101010011010100010001010010011010010100111001101010010101010111101001001101011110100110110001101001010110100101011101000101001100000101101001101101010101100110101101001101011011100011000000111101

이렇게 나온것을 BIN 2 ASCII 온라인 툴을 사용해서 컨버트 해주면 BASE64로 디코딩 해주면 될 것 같은 문자열이 나온다.

BASE64로 decode 해주었더니 flag가 나왔다.

FLAG : Bugs_Bunny{05fe8238cfee1e5f04b65339bea4fed2}