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Mr-Worldwide

Write-up author: jon-brandy

DESCRIPTION:

A musician left us a message. What's it mean?

HINT:

  • NONE

STEPS:

  1. First, download the file given.
  2. Since it's a .txt file, let's see what strings inside by run -> strings message.txt.

OUTPUT

image

  1. At first, i didn't get what it means. But there's something that caught my attention.
  2. The one with minus value.

image

  1. It reminds me of an (x, y) coordinate?
  2. So i opened google maps, and paste the coordianates at the search area and got this!

image

  1. Hmm Dayton.. Might be just a coincidence, so i tried another value, this time i tried the first one.

image

  1. This time Kyoto. I think it really does a coordinates, so i tried to concate every each one of them from the start.

OUTPUT:

Kyoto, Odessa, Dayton, Istanbul, Abu Dhabi, Kuala Lumpur, _ Adis Ababa, Loja, Amsterdam, Sleepy Hollow, Kodiak, Alexandria Governorate
  1. It does confusing, either i took the region or the city name of it. I tried to took every each and took the first character of each string and concate them. But the one which the web accept is flag from the name above.
  2. If i took every first index of the string, it will give us:
KODIAK_ALASKA
  1. Finally just wrap it around with picoCTF{}.

FLAG

picoCTF{KODIAK_ALASKA}

NOTES:

I think there's an intended solution for this challenge.