ctf-writeup/2023/Srdnlen CTF 2023/Urban Odissey

Urban Odissey

I can't remember the city where I lost my trail. Can you help me find my secret map of the treasure?

About the Challenge

We were given a pcapng file that contains a lot of requests about city (You can download the file here)

How to Solve?

When I analyzed the file, there is 1 unusual HTTP request like the image below:

When I tried to decode the string, the result was the latitude and longitude of a location

Now, let's find Mumbai inside the pcapng file and there is 1 HTTP request that contains that string

Decode the body response using Base64 encoding

srdnlen{1t_w4snt_t00_d1ff1cult_but_Mumb41_1s_c4h0tic_30100}