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ctf:public:9447:imaged

Table des matières

Imaged

Challenge

Our spies found this image. They think something is hidden in it… what could it be?

imaged.zip

Solution

With hexdump -C we notice that the characters « 9447 » are placed on the CRC field of the image header chunk. So, we can use hachoir-urwid to obtain the CRC field of all chunks. They all correspond to printable ascii characters until we find the « } » character.

The flag is 9447{Steg0_redunDaNcy_CHeck}

ctf/public/9447/imaged.txt · Dernière modification: 2015/12/07 09:54 par arthaum