 Hello everybody, welcome back to another video regarding the local CTF for capsule flag competition that I put together as practice for my school cyber team and in this video I want to check out the assumption song challenge that I put together and built and I want to show you how to solve it and how to build it which was pretty simple. Check out my cool new song was the prompt and the hint was I don't hear any music is it really so when you download this you would go ahead and show in folder after you downloaded it and you'd probably want to extract the archive however Archmanger will tell you that whoa an error occurred we actually can't download this early we can't we can't extract anything out of this archive because something is apparently wrong so the ploy is that the assumption song is that you as an individual you as a computer user will typically assume a file is what they say it is although it is it is not I actually just created an image and renamed it to a dot rar file so if you were to actually run file on this file on this in this file it'll tell you that hey this is actually a PNG image data so it's actually a picture not an archive that would supposedly contain music so at that point you would oh no to open it as an image for one thing so I'll use I have known and I'll note to run it on the assumption song dot rar so simply question everything you see today not everything is what it seems so there's our there's our flag very easy very simple but I think it would drive the point home that you can't always look at or like take what you what you are receiving in a CTF challenge and know that it is what it says it is so yeah again that's our flag we'll go ahead and and add that all I'd really done with this as I found this image on Google added the flag into it and then I renamed the file not a hard thing to do I didn't actually create a script or anything to demonstrate that but that's how we solved it and how I kind of piece it together and we'd collect all 100 points for that if very easy and very simple okay thanks for watching guys on next video