Chalkboard (CTF Learn)

Forensics

Challenge — Chalkboard — CTFlearn — CTF Practice — CTF Problems — CTF Challenges

Solve the equations embedded in the jpeg to find the flag. Solve this problem before solving my Scope challenge which is worth 100 points.

math.jpg

Don’t forget we always work inside VMs .

So we’ll upload the file there and then :

We took the download link and used wget to download the :

I always change the names to something that is closest to what we do, so I changed the name of the file to the name of the task that we are doing now , Now let’s get started :

Here we define the file type , There are a lot of interesting things :

I decided to use exif and exiftool:

We found this comment suspicious :

Let’s search using strings :

It’s a math story , We have to solve it then :

When I substituted the two equations, I found that x = 2 and y = 5

Here is the flag\ See you soon in other reports….!!

Abdelwahab_Shandy

AS_Cyber