30, the gloves came off

0x01, Topic: gloves came off

0x02、WP

1. Right-link, click on the new tab to open the link, and save attachments

As shown below:

2, it began to picture steganography routine

①, open the image to view the problem as well as the width and height of the background color

As shown below, the width might be a little problem, so we changed a bit myself

picture amended as follows: But in the process of revision, the width changes can lead to erroneous picture, so here try to modify the height, but nothing special character display

② right, property details

As shown below: This topic one really *******

③, Notepad open, issued search pulled + bottom:

First, the search to no avail;

Secondly, we pulled the bottom, find a string of hexadecimal string

As follows: find the hexadecimal string of circulation 28xx2cxx29, we guess this is (xx, xx) coordinates

④, put the hex string, converted to ASCII code by notepad ++

As shown below:

Second, then converted to the coordinates, and removal of the brackets comma;

As shown below:

⑤, the coordinates of the text of the name xy.txt, dragged Kali, performed
gnuplot
Plot "xy.txt"

As shown below: to obtain a two-dimensional code

Have scan code, flag

As shown below:

0x03、Flag

flag{40fc0a979f759c8892f4dc045e28b820}