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Travel to the home

by Iregon / r00tstici

Tags: osint 

Rating: 5.0

Travel to the home - DarkCON 2021

  • Category: OSINT
  • Points: 448
  • Solves: 78
  • Solved by: drw0if, iregon, hdesk

Problem

I Travelled from MAS to CBE at 10 Jan 2020 (Any direction) and i took a beautiful picture while travelling
Find the Exact location (co-ordinates upto 2 decimal point) and approximate time while i took the pick
Flag format will be {lat,long,time} for time it is 1 hour duration like (01-02)
Flag Format: darkCON{1.11,1.11,01-02}
Hint: Don't brute as maybe you could miss something on location , Find the time correctly and location

Along with the problem we were also given an image.

Solution

The solution search is divided into two parts:

1. The position (lat and long)

Googling 'MAS to CBE' we discover that they are the codes of two railway stations in India (Google Maps):

From the image we have been given with the problem, we can notice three details:

  1. in the image the railroad passes over what looks like a river;
  2. on the right side there is a factory that seems to be of the mining sector;
  3. in the lower left corner is what looks like a temple with a building with a green roof.

There are only 2 points along the train route that pass over a river:

Point 1Point2

In point 1 we can see the presence of a structure similar to a quarry (so mining activity) and a temple with a building with a green roof:

BINGO! We found the point from where the photo was taken and it is lat: 11.34 and long: 77.75 (link)

2. The time

Looking for all available trains at 10 Jan 2020 (link) for the route from MAS to CBE we got:

Excluding trains that do not depart from MAS and arrive at CBE and that run at night, we concluded that the time the photo was taken should be between 9 a.m. and 11 a.m. (at 10 Jan 2020, the sunrise was at 07:15 and the sunset was at 17:42 at New Delhi).

Conclusion

So the possible flags could be 2:

  1. darkCON{11.34,77.75,09-10}
  2. darkCON{11.34,77.75,10-11}

We inserted, for no apparent reason, first the flag darkCON{11.34,77.75,10-11} and, it worked.

Flag

darkCON{11.34,77.75,10-11}
Original writeup (https://github.com/r00tstici/writeups/tree/master/DarkCON2021/Travel_to_the_home).

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