WeChall - Training - Stegano I

Posted on Edited on In Views: Disqus:

Look at the picture... 看看这张图片...

Challenge

Download the BMP file and examine it.

Solution

1
2
3
4
wget https://www.wechall.net/challenge/training/stegano1/stegano1.bmp
file stegano1.bmp
# PC bitmap, Windows 3.x format, 4 x 4 x 24
xxd stegano1.bmp

The BMP is only 4x4 pixels. Looking at the hex dump reveals hidden text after the pixel data:

1
2
3
4
00000030: ... 4c6f 6f6b 2077 6861 7420  Look what
00000040: 7468 6520 6865 782d 6564 6974 2072 6576  the hex-edit rev
00000050: 6561 6c65 643a 2070 6173 7377 643a 7374  ealed: passwd:**
00000060: 6567 616e 6f49                           ******