Description: Acharya Dev, a 25 year old hacker, suspected to be the main culprit in many illegal activities left a big clue to find where he was in social media, That may lead us to him. NOTE:There are 3 level.the final flag you get needs to be submitted P.S. Enclose the flag in pCTF{} and use capital letters for the answer you get.
Starting off, the description of the challenge suggests that we should start by searching for Acharya Dev, a hacker, on social media. The name is not that unique so a Google search didn't yield good results for us. We decided to check each social media site individually.
Starting off with Instagram, we searched for "Acharya Dev" and came across this particular account.
He has one post with the following images containing numbers and the picture of a globe.
He also has a post caption that says that the post is a clue. He also talks about a tower and says that the name of the tower is the flag.
All hints, from the numbers to the picture of the globe and him talking about a location (in this case, the tower) indicate towards the fact that the numbers are coordinates. And sure enough, Googling the numbers gives us the coordinates-
51.5007° n 0.1246° w
Looking these coordinates up gives us a location on the map that is labelled "Big Ben". Big Ben is a clocktower in London. So we have the flag-
pCTF{BIGBEN}