What? If you think that I am attacking DMS … I’m not certain what to say, other than there are no attacks other than an off hand remark about chairs.
I was not trying to offend or attack anyone, just wanted to know what the acronym CTF was? Question was asked and I got my answer.
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Gentlemen lets keep this on topic. Thank you.
Now What can one expect at a CTF (capture the flag):
Theme
Santa Claus is coming to town
Hiding a file in an image
One of the most common steganography tricks is to hide a file inside of an image. The file will open normally as an image but will also hold hidden files inside, commonly zip, text, and even other image files.
The reason this works is because when an image file is read it has starting and ending bytes dictating the size of the image. The image viewer that you use will use the information between these bytes to present an image to you, ignoring anything after the terminating byte.
For example, The terminating byte for a JPEG is FF D9 in hex, so using a hex viewer (xxd is good for linux, or something like HxD for windows) you can find out where the image finishes. These bytes are sometimes hard to find in a sea of numbers though, so looking at the dump of the hex (the text representing the hex bytes) can also help you find hidden .txt or .zip files.
https://ctfs.github.io/resources/topics/steganography/file-in-image/README.html
Stay Frosty guys: https://ctf.dallasmakerspace.org/index.php?page=login
Stage one means guess the password and username. You have your username here while the password is up to you. Hint; its most commonly used.
From there your tasks will be found on the site.
Good luck and godspeed.
Thanks! I’ll add that to the toolkit.
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