Day 05: OSINT 1

It’s all about transparency

Challenge

Santa has hidden your daily present on his server, somewhere on port 443.

Start on https://www.hackvent.org and follow the OSINT traces.

Solution

We go to the site and see this:

Googling leads us to certificate transparancy

And this site where we can find the other vhost referred to in the challenge:

https://transparencyreport.google.com/https/certificates

when we visit osintiscoolisntit.hackvent.org we are greeted with the flag:

Flag