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[IceCTF2016]Thor’s a hacker now – 55pt

Question:

Thor has been staring at this for hours and he can't makeany

sense out of it, can you help him figure out what it is?

thor.txt

Solution:

thor.txt 的一部份是這樣的

{IceCTF2016}[Misc](Stage2)Thor's a hacker now - 55pt

這明顯是直接由十六進制工具dump出來的數據 , 而我們感興趣的只有紅框內的數據而已

文件有21116行 , 所以我們只能使用程式自動提取了 , 故得出了以下算法

{IceCTF2016}[Misc](Stage2)Thor's a hacker now - 55pt

得到thor.lz , 然後用工具解壓之

{IceCTF2016}[Misc](Stage2)Thor's a hacker now - 55pt

得到一檔案 , 用C32asm查看之

ffd8ffe0告訴我是jpg的文件 , 更改格式後查看

{IceCTF2016}[Misc](Stage2)Thor's a hacker now - 55pt

IceCTF{h3XduMp1N9_l1K3_A_r341_B14Ckh47}

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