FourAndSix:1 CTF

This time I tried 1st VM from the series called FourAndSix by Fred Wemeijer. Below you will find the details...
We will start here:

Ok, OpenBSD. Quick portscan:

And we should be somewhere here:

As you can see there is mountd port open. Let's check it:

Good. Creating new directory on my Kali to mount remote share:

Let's copy that img file to our 'local directory'. I decided to use binwalk (you can find more example cases when I used that tool here):

First I decided to list available files:

Next I used strings to check if there will be something interesting in the image file:

So - there was... Kinda 'ssh key'... we'll see.

Next I saved strings  'results' in new file ('just in case' I'll need them somehow - btw there is a username too ;) see? ):

 Checking USB-file:

In the meantime it was a good idea to check this book:

You will find there:

More:

Next hint:

Checking:

Searching for the flag file:

It's done.

See you next time!

Cheers