OSINT - Find the needle...

Challenge description:

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Solution:

To solve this challenge, I used ripe.net

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Using (RIPE Database Text Search), I searched for 194.210

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I got 80 inetnum search results:

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Note:

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Then I checked every inetnum in the search results pages, and I found this interesting one in page 6:

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66 6c 61 67 7b 75 73 45 5f 41 5f 62 69 67 5f 6d 40 67 6e 33 74 21 7d

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flag{usE_A_big_m@gn3t!}

Original writeup (https://github.com/Cyb3rDoctor/e-Jornadas_CTF/blob/main/Find_the_needle.md).