Adworld - 適合作為桌面

tags: Adworld CTF Misc

Challenge: 適合作為桌面

Background

Day8 Python基礎-pyc是什麼

Exploit

1. Analyze Steganography

2. QR Code Reader

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
   

   It seems a byte code of a file.

3. HxD It can be disassembled by pyc tools.

4. pyc disassemble :::spoiler

    def flag():
        str = [
            102,
            108,
            97,
            103,
            123,
            51,
            56,
            97,
            53,
            55,
            48,
            51,
            50,
            48,
            56,
            53,
            52,
            52,
            49,
            101,
            55,
            125,
        ]
        flag = ""
        for i in str:
            flag += chr(i)
        print flag
   

   :::

Reference

XCTF练习题—MISC—适合作为桌面