Recently Updated
Moonwalk
Challenge
There is something a little off about this picture. If you could help us we could give you some points! Just find us a flag!
Solution
There was more data appended to the end of the image, we can extract this using binwalk
1
2
3
4
5
6
7
8
9
10
$ binwalk PurpleThing.png [16-07-16 17:56:05]
DECIMAL HEXADECIMAL DESCRIPTION
--------------------------------------------------------------------------------
0 0x0 PNG image, 3200 x 2953, 8-bit/color RGBA, non-interlaced
85 0x55 Zlib compressed data, best compression
2757 0xAC5 Zlib compressed data, best compression
765455 0xBAE0F JPEG image data, JFIF standard 1.01
765485 0xBAE2D TIFF image data, big-endian, offset of first image directory: 8
1809691 0x1B9D1B StuffIt Deluxe Segment (data): f
we extract the jpeg image
1
$ binwalk --dd=jpeg PurpleThing.png
Flag
ABCTF{PNG_S0_C00l}