i春秋上的题,也是朋友推荐给我的


Question:

We found this very mysterious image, it doesn't look complete and there seems to be something hidden on it... does this mean anything to you? beach.jpg This flag is not in the standard flag format. The flag contains digits and no special characters, convert the message to lowercase and then add IceCTF{message} to it. 10331c4d


Writeup:

拿到图片首先文本打开看看文件头
icesand00
一开始并不是很清楚这是什么,但是可以肯定是个有用的信息

然后Google以图搜图准备做双图分析的时候搜出这是本贼贵的书的封面,不难联想到上面的信息大概是个 页数-行数-列数 这样的密码。那个10331c4d大概是个CRC之类的玩意儿,不是很确定所以还是把这个拿来搜了一波,搜出一大堆WP2333。

直接把信息带进书里面就可以了,还是比较麻烦。
flag:IceCTF{n0obzr3adbo0x}