PicoCTF_2017: Hex2Raw

Category: Reverse Engineering Points: 20 Description:

This program requires some unprintable characters as input... But how do you print unprintable characters? CLI yourself to /problems/33432c6de9329bca3a3ff26e5538d8f2 and turn that Hex2Raw!

Hint:

Google for easy techniques of getting raw output to command line. In this case, you should be looking for an easy solution.

Write-up

In simple python,

$python -c "import base64; print('9b0f7b43804d4abd6f7e1bbe51
5c55d5'.decode('hex'))" | /problems/33432c6de9329bca3a3ff26e
5538d8f2/hex2raw
Give me this in raw form (0x41 -> 'A'):                     
9b0f7b43804d4abd6f7e1bbe515c55d5                            

You gave me:                                                
9b0f7b43804d4abd6f7e1bbe515c55d5                            
Yay! That's what I wanted! Here be the flag:
84234a119cee0edf78366463973d518c

Therefore, the flag is 84234a119cee0edf78366463973d518c.

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