Squnity (an arab infosec community) organized a CTF on the 10th of January 2019.
It had really interesting challenges. And although I wasn't able to participate, I downloaded the binaries and took screenshots of the challenges to take a look at them later.
Here are the ones I solved: ? (click the link for the write-up)
And the ones I couldn't solve: ?
My router password. (solved by team X-Vector... )
Ransomware. (also solved by team X-Vector... )
P.S: I asked Squnity for the permission to upload the binaries too, so that the readers can solve them again, but they haven't replied, so I can't publish them in public.
If you want the binaries, comment with your email, or hit me up on twitter ?..
Also take a look at team X-Vector's writeup. It's amazing.