Securinets-ctf-2015-stegano-google

Category: Stegano 
Points: 150
Hint : Useless to google it (Inutile de googler)
 Url : http://41.231.22.133:8030/1/google.png

The analysis of the image with different tools does not show any possible ways .

Zooming the image show some red pixels in specifque points .

Let’s collect red pixels coordinate’s  :


100,100
220,150
300,300
400,450
600,500
650,200
700,300
1000,600
900,400
1300,250


Now having pixels we check the RGB values  in each pixel :

the extraction show ascii chars in blue when we concatenate them we found the flag