https://blog.ar-lacroix.fr/ Recent content on A blog about stuff I do Hugo -- gohugo.io en © 2026 Lacroix Raphaël (Chepycou) Fri, 08 May 2026 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2026-11-thcon-ctf-2026-geosint-write-up/ Fri, 08 May 2026 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2026-11-thcon-ctf-2026-geosint-write-up/ Here is a Writeup of the geoINT challenges (Gunnar s Vacation bis) I created for the THCon 2026 CTF https://blog.ar-lacroix.fr/posts/2026-10-customize-ctfd-to-show-challenges-difficulty-without-changin-themes/ Sun, 26 Apr 2026 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2026-10-customize-ctfd-to-show-challenges-difficulty-without-changin-themes/ Here is a Lessons Learn of me wanting to add a way to see the difficulty of each challenges on a CTFd while not being able to change the theme. https://blog.ar-lacroix.fr/posts/2026-09-thcon-prechallenge-2026/ Sun, 29 Mar 2026 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2026-09-thcon-prechallenge-2026/ Be the first to uncover the mysterious attacks on THCity ! https://blog.ar-lacroix.fr/posts/2026-06-tutorial-run-poc-code-from-a-repo-starter-pack/ Fri, 27 Feb 2026 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2026-06-tutorial-run-poc-code-from-a-repo-starter-pack/ This article details the basics of running code found online on github, gitlab or codeberg for instance https://blog.ar-lacroix.fr/posts/2026-05-hack-the-box-pterodactyl-medium-write-up/ Sat, 14 Feb 2026 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2026-05-hack-the-box-pterodactyl-medium-write-up/ Here is a Writeup of the Medium Pterodactyl HTB box. https://blog.ar-lacroix.fr/posts/2026-04-hack-the-box-facts-easy-write-up/ Sat, 07 Feb 2026 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2026-04-hack-the-box-facts-easy-write-up/ Here is a Writeup of the Easy Facts HTB box. https://blog.ar-lacroix.fr/posts/2026-03-why-replace-whatsapp-with-signal-or-another-app/ Tue, 03 Feb 2026 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2026-03-why-replace-whatsapp-with-signal-or-another-app/ Here is an article detailing the various reasons for using Signal (or another alternative) rather than WhatsApp. The primary purpose of this blog post is to enable me to refer anyone who asks me this question on a daily basis to it. https://blog.ar-lacroix.fr/posts/2026-02-hack-the-box-overwatch-medium-write-up/ Sun, 01 Feb 2026 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2026-02-hack-the-box-overwatch-medium-write-up/ Here is a Writeup of the Medium Overwatch HTB box. https://blog.ar-lacroix.fr/posts/2026-01-why-do-cve-numbers-start-with-high-numbers-early/ Tue, 27 Jan 2026 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2026-01-why-do-cve-numbers-start-with-high-numbers-early/ This article aims at showcasing how CVE numbers are attributed starting the fact that “high”-numbered CVEs can be seen published even early in the year https://blog.ar-lacroix.fr/posts/2025-43-hack-the-box-monitorsfour-easy-write-up/ Fri, 12 Dec 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-43-hack-the-box-monitorsfour-easy-write-up/ Here is a Writeup of the Easy MonitorsFour HTB box. https://blog.ar-lacroix.fr/posts/2025-42-composing-an-original_soundtrack_for_a_game/ Sun, 30 Nov 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-42-composing-an-original_soundtrack_for_a_game/ Composing a soundtrack for a 2D shooter game https://blog.ar-lacroix.fr/posts/2025-41-hack-the-box-nanocorp-hard-write-up/ Mon, 10 Nov 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-41-hack-the-box-nanocorp-hard-write-up/ Here is a Writeup of the Hard NanoCorp HTB box. https://blog.ar-lacroix.fr/posts/2025-40-hack-the-box-giveback-medium-write-up/ Fri, 07 Nov 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-40-hack-the-box-giveback-medium-write-up/ Here is a Writeup of the Medium Giveback HTB box. https://blog.ar-lacroix.fr/posts/2025-39-hack-the-box-code-part-two-easy-write-up/ Wed, 29 Oct 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-39-hack-the-box-code-part-two-easy-write-up/ Here is a Writeup of the Easy Code Part Two HTB box. https://blog.ar-lacroix.fr/posts/2025-38-hack-the-box-conversor-easy-write-up/ Tue, 28 Oct 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-38-hack-the-box-conversor-easy-write-up/ Here is a Writeup of the Easy Conversor HTB box. https://blog.ar-lacroix.fr/posts/2025-37-hack-the-box-signed-medium-write-up/ Thu, 16 Oct 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-37-hack-the-box-signed-medium-write-up/ Here is a Writeup of the Medium Signed HTB box. https://blog.ar-lacroix.fr/posts/2025-36-hack-the-box-darkzero-hard-write-up/ Fri, 10 Oct 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-36-hack-the-box-darkzero-hard-write-up/ Here is a Writeup of the Hard DarkZero HTB box. https://blog.ar-lacroix.fr/posts/2025-35-hack-the-box-editor-easy-write-up/ Wed, 06 Aug 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-35-hack-the-box-editor-easy-write-up/ Here is a Writeup of the Easy Editor HTB box. https://blog.ar-lacroix.fr/posts/2025-33-hack-the-box-era-medium-write-up/ Thu, 31 Jul 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-33-hack-the-box-era-medium-write-up/ Here is a Writeup of the Medium Era HTB box. https://blog.ar-lacroix.fr/posts/2025-33-hack-the-box-artificial-easy-write-up/ Thu, 10 Jul 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-33-hack-the-box-artificial-easy-write-up/ Here is a Writeup of the Easy Artificial HTB box. https://blog.ar-lacroix.fr/posts/2025-32-latex-template-for-weddings-like-ceremonies/ Thu, 19 Jun 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-32-latex-template-for-weddings-like-ceremonies/ After a short introduction of the songs package last time here is my Wedding Booklet template based off it https://blog.ar-lacroix.fr/posts/2025-30-hack-the-box-code-easy-write-up/ Wed, 18 Jun 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-30-hack-the-box-code-easy-write-up/ Here is a Writeup of the Easy Code HTB box. https://blog.ar-lacroix.fr/posts/2025-31-hack-the-box-fluffy-easy-write-up/ Wed, 18 Jun 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-31-hack-the-box-fluffy-easy-write-up/ Here is a Writeup of the Easy Fluffy HTB box. https://blog.ar-lacroix.fr/posts/2025-28-hack-the-box-cyher-medium-write-up/ Mon, 16 Jun 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-28-hack-the-box-cyher-medium-write-up/ Here is a Writeup of the Medium Cypher HTB box. https://blog.ar-lacroix.fr/posts/2025-27-hack-the-box-puppy-medium-write-up/ Sat, 14 Jun 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-27-hack-the-box-puppy-medium-write-up/ Here is a Writeup of the Medium Puppy HTB box. https://blog.ar-lacroix.fr/posts/2025-26-hack-the-box-the-frizz-medium-write-up/ Fri, 13 Jun 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-26-hack-the-box-the-frizz-medium-write-up/ Here is a Writeup of the Medium The Frizz HTB box. https://blog.ar-lacroix.fr/posts/2025-25-hack-the-box-dog-easy-write-up/ Wed, 11 Jun 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-25-hack-the-box-dog-easy-write-up/ Here is a Writeup of the Easy Dog HTB box. https://blog.ar-lacroix.fr/posts/2025-24-hack-the-box-titanic-easy-write-up/ Tue, 10 Jun 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-24-hack-the-box-titanic-easy-write-up/ Here is a Writeup of the Easy Titanic HTB box. https://blog.ar-lacroix.fr/posts/2025-23-money-management-software-based-on-enveloppe-system/ Mon, 09 Jun 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-23-money-management-software-based-on-enveloppe-system/ Since no Money Management Software did fit my needs, and the creator of Denaro is already too busy on other projects, I decided to create my own MMS based on the Enveloppe System https://blog.ar-lacroix.fr/posts/2025-22-hack-the-box-environment-medium-write-up/ Sat, 07 Jun 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-22-hack-the-box-environment-medium-write-up/ Here is a Writeup of the Medium Environment HTB box. https://blog.ar-lacroix.fr/posts/2025-21-hack-the-box-certified-penetration-tester-lessons-learned/ Sat, 31 May 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-21-hack-the-box-certified-penetration-tester-lessons-learned/ My feedback and pieces of advice for The Hack The Box Certified Penetration Tester certification https://blog.ar-lacroix.fr/posts/2025-20-hack-the-box-planning-easy-write-up/ Tue, 20 May 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-20-hack-the-box-planning-easy-write-up/ Here is a Writeup of the Easy Planning HTB box. https://blog.ar-lacroix.fr/posts/2025-19-hack-the-box-cat-medium-write-up/ Sat, 17 May 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-19-hack-the-box-cat-medium-write-up/ Here is a Writeup of the Medium Cat HTB box. https://blog.ar-lacroix.fr/posts/2025-18-hack-the-box-backfire-medium-write-up/ Fri, 16 May 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-18-hack-the-box-backfire-medium-write-up/ Here is a Writeup of the Medium Backfire HTB box. https://blog.ar-lacroix.fr/posts/2025-17-hack-the-box-heal-medium-write-up/ Thu, 15 May 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-17-hack-the-box-heal-medium-write-up/ Here is a Writeup of the Medium Heal HTB box. https://blog.ar-lacroix.fr/posts/2025-16-songs-latex-booklet-lessons-learned/ Wed, 14 May 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-16-songs-latex-booklet-lessons-learned/ My feedbacks on the Songs Package, and how to use it to easily create a Wedding, Ceremony or Baptism Booklet https://blog.ar-lacroix.fr/posts/2025-15-hack-the-box-whiterabbit-insane-write-up/ Tue, 13 May 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-15-hack-the-box-whiterabbit-insane-write-up/ Here is a Writeup of the Insane WhiteRabbit HTB box. https://blog.ar-lacroix.fr/posts/2025-14-hack-the-box-underpass-easy-write-up/ Sat, 10 May 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-14-hack-the-box-underpass-easy-write-up/ Here is a Writeup of the Easy UnderPass HTB box. https://blog.ar-lacroix.fr/posts/2025-13-hack-the-box-eureka-hard-write-up/ Sat, 03 May 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-13-hack-the-box-eureka-hard-write-up/ Here is a Writeup of the Hard Eureka HTB box. https://blog.ar-lacroix.fr/posts/2025-12-hack-the-box-nocturnal-easy-write-up/ Sun, 27 Apr 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-12-hack-the-box-nocturnal-easy-write-up/ Here is a Writeup of the Easy Nocturnal HTB box. https://blog.ar-lacroix.fr/posts/2025-9-thcon-ctf-2025-foreign-interference-steganography-write-up/ Sun, 13 Apr 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-9-thcon-ctf-2025-foreign-interference-steganography-write-up/ Here is a Writeup of the first Steganography challenge (Foreign Interference) I created for the THCon 2025 CTF https://blog.ar-lacroix.fr/posts/2025-11-thcon-ctf-2025-geosint-write-up/ Sun, 13 Apr 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-11-thcon-ctf-2025-geosint-write-up/ Here is a Writeup of the geoINT challenges (Gunnar s Vacation) I created for the THCon 2025 CTF https://blog.ar-lacroix.fr/posts/2025-10-thcon-ctf-2025-scattered-social-steganography-write-up/ Sun, 13 Apr 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-10-thcon-ctf-2025-scattered-social-steganography-write-up/ Here is a Writeup of the second Steganography challenge (Scattered Socials) I created for the THCon 2025 CTF https://blog.ar-lacroix.fr/posts/2025-8-wocsapyjail-python-jailbreak-writeup/ Thu, 10 Apr 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-8-wocsapyjail-python-jailbreak-writeup/ Here is a Writeup of the Python Jailbreak by WOCSA presented as a small challenge at the THCon 2025 https://blog.ar-lacroix.fr/posts/2025-7-dnschef-fix-bloodhound-connectivity-issues-over-proxies/ Mon, 07 Apr 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-7-dnschef-fix-bloodhound-connectivity-issues-over-proxies/ Here is a short tutorial on how to use DNSchef to solve bloodhound connectivity issues with LDAP timeouts, especially over proxies https://blog.ar-lacroix.fr/posts/2025-6-hack-the-box-ghost-insane-writeup/ Sun, 06 Apr 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-6-hack-the-box-ghost-insane-writeup/ Here is a Writeup of the now retired Insane Ghost HTB box. https://blog.ar-lacroix.fr/posts/2025-5-customize-ctfd-to-sort-challenges-without-themes/ Wed, 02 Apr 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-5-customize-ctfd-to-sort-challenges-without-themes/ Here is a Lessons Learn of me having to sort challenges on a CTFd while not being able to change the theme. https://blog.ar-lacroix.fr/posts/2025-4-hack-the-box-cyberapocalypse-write-up-web/ Wed, 26 Mar 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-4-hack-the-box-cyberapocalypse-write-up-web/ A full writeup of the Web challenge I flagged during HackTheBox CyberApocalypse 2025 : Trial by Fire and Whispers of the Moonbeam https://blog.ar-lacroix.fr/posts/2025-3-try-hack-me-hackfinity-write-up-others/ Sat, 22 Mar 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-3-try-hack-me-hackfinity-write-up-others/ A full writeup of the rest of the challenges I flagged during Try Hack Me Hackfinity 2025 https://blog.ar-lacroix.fr/posts/2025-2-try-hack-me-hackfinity-write-up-web/ Fri, 21 Mar 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-2-try-hack-me-hackfinity-write-up-web/ A full writeup of the Web challenge I flagged during Try Hack Me Hackfinity 2025 https://blog.ar-lacroix.fr/posts/2025-1-toulouse-hacking-convention-2025-prechall/ Tue, 18 Mar 2025 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2025-1-toulouse-hacking-convention-2025-prechall/ Be the first to uncover the mysterious gang attacks ! https://blog.ar-lacroix.fr/posts/2024-9-mastodon-back-poster-a-tool-to-fake-large-scale-social-networks-for-ctfs/ Sun, 08 Dec 2024 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2024-9-mastodon-back-poster-a-tool-to-fake-large-scale-social-networks-for-ctfs/ Here is an overview of a tool I have been developping to create full scale social networks for OSINT challenge https://blog.ar-lacroix.fr/posts/2024-8-ohxy-ctf-2024-writeup-forensic/ Tue, 29 Oct 2024 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2024-8-ohxy-ctf-2024-writeup-forensic/ A writeup of the Forensics challenges of the 2024 OHxY CTF https://blog.ar-lacroix.fr/posts/2024-7-ohxy-ctf-2024-writeup-physical/ Mon, 28 Oct 2024 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2024-7-ohxy-ctf-2024-writeup-physical/ A writeup of the Physical challenges of the 2024 OHxY CTF https://blog.ar-lacroix.fr/posts/2024-6-ohxy-ctf-2024-writeup-stega-web/ Sun, 27 Oct 2024 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2024-6-ohxy-ctf-2024-writeup-stega-web/ A writeup of the Steganography and Web challenges of the 2024 OHxY CTF https://blog.ar-lacroix.fr/posts/2024-5-2024-l3akctf-geosint-write-ups/ Sun, 26 May 2024 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2024-5-2024-l3akctf-geosint-write-ups/ My writeups of the 4 OSINT (geoINT) challenge of the 2024 L3akCTF https://blog.ar-lacroix.fr/posts/2024-3-toulouse-hacking-convention-2024-net/ Tue, 09 Apr 2024 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2024-3-toulouse-hacking-convention-2024-net/ A full writeup of the 3 step Network challenge I co-created for the Toulouse Hacking Convention 2024 https://blog.ar-lacroix.fr/posts/2024-4-toulouse-hacking-convention-2024-osint/ Tue, 09 Apr 2024 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2024-4-toulouse-hacking-convention-2024-osint/ A full writeup of the 8 step OSINT challenge I co-created for the Toulouse Hacking Convention 2024 https://blog.ar-lacroix.fr/posts/2024-2-braeker-ctf-2024-write-up-2/ Tue, 27 Feb 2024 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2024-2-braeker-ctf-2024-write-up-2/ A writeup of the eye doctor and Thus spoke machine challenges of the 2024 Braeker CTF https://blog.ar-lacroix.fr/posts/2024-1-braeker-ctf-2024-write-up/ Sun, 25 Feb 2024 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2024-1-braeker-ctf-2024-write-up/ A writeup of the microservices and e challenge of the 2024 Braeker CTF https://blog.ar-lacroix.fr/posts/2023-2-cybersecurity-awareness-videos-for-the-thcon-/ Sun, 12 Nov 2023 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2023-2-cybersecurity-awareness-videos-for-the-thcon-/ An overview of the cybersecurity awareness videos for the THCon https://blog.ar-lacroix.fr/posts/2023-1-zitf-2023-osint-writeup/ Sat, 11 Mar 2023 00:00:00 +0000 https://blog.ar-lacroix.fr/posts/2023-1-zitf-2023-osint-writeup/ A writeup of the first flag of the ZiTF OSINT CTF