CrossCTF_2017: Sky Pillar 1

Category: Reverse Engineering Points: 100 Description:

192.168.0.31:1350 File here

Write-up

Looking in levelone(), we find our hex-encoded passphrase in little endian, so we need to deal with that.

0x40772049
0x20406e6e
0x74206562
0x76206568
0x20797265
0x74736562

V

49207740
6e6e4020
62652074
68652076
65727920
62657374

Decoding it yields I w@nn@ be the very best. Entering it into the server gives us the flag.

$ ./skypillar
                                 Welcome to                                    
 ______     __  __     __  __        ______   __     __         __         ______     ______
/\  ___\   /\ \/ /    /\ \_\ \      /\  == \ /\ \   /\ \       /\ \       /\  __ \   /\  == \
\ \___  \  \ \  _"-.  \ \____ \     \ \  _-/ \ \ \  \ \ \____  \ \ \____  \ \  __ \  \ \  __<
 \/\_____\  \ \_\ \_\  \/\_____\     \ \_\    \ \_\  \ \_____\  \ \_____\  \ \_\ \_\  \ \_\ \_\
  \/_____/   \/_/\/_/   \/_____/      \/_/     \/_/   \/_____/   \/_____/   \/_/\/_/   \/_/ /_/
================================================================================
                    Home of the legendary Pokemon, Rayquaza                          
================================================================================
There are 5 Levels to climb. Each level requires a specifc code to unlock the next level.
Your goal is to reach the top, and catch the legendary Rayquaza... Good luck!
====================================================================
                          LEVEL 01                                  
====================================================================
Enter code: I w@nn@ be the very best
CrossCTF{xxxxxxxxxxxxxxxxx}

Therefore, the flag is ``.

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