CyBRICS Quals 2019: Warmup (Web)
E_TOO_EASY
In this challenge, the description provides a link and tells us to Just get the flag. Upon clicking the link, we are immediately redirected from http://45.32.148.106/ to http://45.32.148.106/final.html.
Doing a quick ctrl-f for the flag format leaves us with no results. But what about the original page before redirection? We can prevent the redirection by simply using the curl command.
vagrant@ubuntu-cosmic:/vagrant$ curl http://45.32.148.106 | tail
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 120k 100 120k 0 0 101k 0 0:00:01 0:00:01 --:--:-- 102k
One has only been a Napoleon, nor any personage of that I lost my lessons, and not to leave me.<br/>
He would not entertain the idea of his soul.<br/>
And what if I hear any rumours, I’ll take it back in time,” struck him like a chicken in the stinking, dusty town air.<br/>
Such was the hundredth part of Russia on a line you won’t be angry with me at once whispered almost aloud to the pavement.<br/>
She was a lie at first?”<br/>
Dounia remembered her pale lips was full of people in it when we spoke of you at least!<br/>
For if Sonia has not gone off on the untouched veal, which was in great haste.<br/>
She gave me with their long manes, thick legs, and slow even pace, drawing along a perfect right to kill him as strange and shocking sight.<br/>
Here is your base64-encoded flag: Y3licmljc3s0YjY0NmM3OTg1ZmVjNjE4OWRhZGY4ODIyOTU1YjAzNH0=
</p></body></html>
Looks like that did the trick. Now we just need to base64 decode the string.
vagrant@ubuntu-cosmic:/vagrant$ echo 'Y3licmljc3s0YjY0NmM3OTg1ZmVjNjE4OWRhZGY4ODIyOTU1YjAzNH0=' | base64 -d
cybrics{4b646c7985fec6189dadf8822955b034}
Flag: cybrics{4b646c7985fec6189dadf8822955b034}