WhosDatCat

What is my cats name ? Flag is simply “ECW{Name}”

Introduction

WhosDatCat? is an easy OSINT challenge from the ECW 2025.

Images

Okay, so no interesting metadata.

So let’s drop the second image, and only concentrate on the first one.

As we can see, the cat is looking to a Flipper Zero, which displays some interesting informations:

ISO FDX-B

This is the norm for the animals identification RFID ( https://en.wikipedia.org/wiki/ISO_11784_and_ISO_11785#FDX).

We can also find a documentation about that in a flipper zero documentation: https://docs.flipper.net/rfid/animal-microchips

Thank to these information, we now know that the pet ID is : 250 26 96 02 78 72 77

I-Cad

In France, you have a public organism that manage a pet ID database: https://www.i-cad.fr/

On that website, you can verify the identification and the origin of an animal: https://www.i-cad.fr/verifier-animal-chien-chat-enregistrement-fichiers-officiels

When you put the pet ID on the website (without any space), and you select the “cat” as animal type, you can have all these informations:

Flag: ECW{Arthur}