Find Moriarty

After another failure, Moriarty decided to flee the country. Help Sherlock Holmes to catch him.

Download: sar2020_airport.rar

Recon

.rar with 4 images:

-rw-rw-r-- 1 dsc dsc 2484322 Jan 21 20:17 35d6d33467aae9a2e3dccb4b6b027878.png
-rw-rw-r-- 1 dsc dsc 2706922 Jan 21 20:16 b8a9f715dbb64fd5c56e7783c6820a61.png
-rw-rw-r-- 1 dsc dsc 2358563 Jan 21 20:17 f97c5d29941bfb1b2fdab0874906ab82.png
-rw-rw-r-- 1 dsc dsc   67773 Feb  9 12:38 fly.jpg

fly.jpg says that the pass is the IATA (airport code).

3 images are arial photographs of airports.

f97c5d29941bfb1b2fdab0874906ab82 one b8a9f715dbb64fd5c56e7783c6820a61 two 35d6d33467aae9a2e3dccb4b6b027878 three

Google image search

<jpeg> <airport name> <IATA>

b8... : Heathrow Airport: LHR
35... : Gatwick Airport : LGW
f9... : London Stansted Airport : STN

All around London.

Combined

1 STN 2 LHR 3 LGW

Steghide

$ steghide extract -sf fly.jpg 
Enter passphrase: 
wrote extracted data to "key.txt".
$ cat key.txt 
FLAG{l375_fly_w17h_bu65}

The password is STNLHRLGW

Flag

FLAG{l375_fly_w17h_bu65}