Context We are given an image, l_oeuvre.png. I tried to use binwalk, zsteg and other stuffs but I couldn’t find anything. I finally used Aperi’Solve and got this output: We’ve got the fla...
CTFs | 404CTF2023 | Forensic | Pêche au livre
Context We are given a network packet capture, let’s open it with Wireshark. There are 5 TCP conversations on port 80, It must be a web server: Looking at the Protocol Hierarchy, we can conf...
CTFs | 404CTF2023 | Forensic | Le Mystère du roman d'amour
Context We are given fichier-etrange.swp. The goal is to find: the PID of the crashed processus the path to the file the username the machine name the content of the txt file. Reso...
CTFs | 404CTF2023 | Crypto | Recette
Context Resolution Here are given a code sequence and instructions to decode it. From hex We have to decode the code from hex, here is my code to do it: import binascii code = "32 69 31 73 ...
CTFs | 404CTF2023 | Crypto | Dessine-moi une courbe elliptique
Context We are given the code used to crypt the flag and some other informations. Code Here is the code given: from sage.all import EllipticCurve, GF import hashlib from Crypto.Cipher import...
CTFs | 404CTF2023 | Web3 | L'Antiquaire, tête en l'air
Context We have to find the password of this person. We have the memorandum.txt file. This file is a Memo. A Memo is a short message or description that is attached to a transaction or interac...
CTFs | 404CTF2023 | Web3 | Art
Context We have to find the artist’ address Ethereum. Resolution I used OpenSea website to find the artwork. I searched for “blanc avec des liserés blancs transversaux” that seems to be the n...
CTFs | 404CTF2023 | Cloud | Le Sot
Context Resolution By going on the URL: https://cloud-intro-challenge.s3.gra.io.cloud.ovh.net/ I end up on this page: Inside the Key tag, the value is les-moutons.json. So, I enter the U...
CTFs | 404CTF2023 | Ai | Le Petit Chat
Context We have been provided with an image of a cat and the code utilized by the server to verify whether the AI predicts a teapot and ensure that the image hasn’t been excessively altered. C...
CTFs | 404CTF2023 | Ai | De la poésie
Here is the context: We are given the file “poeme.zip”. Inside of it, there are images of hand written numbers: It is the dataset MNIST, a known dataset in deep learning. I found this colab ...