hackArcana @hackarcana.bsky.social · 5h9 reasons to join our Practical Deep Dive into Cloud Security for Kubernetes® 👇 1️⃣ Hands-on, not slide-heavy 2️⃣ Dedicated lab environment 3️⃣ Real-world security scenarios 4️⃣ Attacker + defender perspective 100
hackArcana @hackarcana.bsky.social · 30/09/2026Work with Kubernetes® and want to go beyond theory? Our hands-on workshop covers: → attack surface & misconfigurations → privilege escalation → RBAC & admission controllers → network hardening → container isolation Starts Oct 21 👇 hackarcana.com/deepdivesec-... P.S. Current price ends today. 010
hackArcana @hackarcana.bsky.social · 29/09/2026The next Practical Deep Dive into Cloud Security for Kubernetes® starts Oct 21. 🧪 6 live, hands-on sessions 🎥 Recordings included 👥 Team pricing for 2+ seats ⏳ The price goes up on October 1. Details & registration 👇 hackarcana.com/deepdivesec-... 000
hackArcana @hackarcana.bsky.social · 23/09/2026🔐 We're going live in just a few hours! Join Jarosław Jedynak & Michał Leszczyński for our technical live: Cloud Security for Kubernetes®. 🕖 Today, 7 PM CEST 🎟️ Free, online, in English, with Q&A Not signed up yet? There's still time! 👇 100
hackArcana @hackarcana.bsky.social · 22/09/2026Kubernetes® permissions gotcha 👀 Imagine a service account that can list ConfigMaps but cannot get them. Sounds like limited access, right? But what if those permissions aren't quite as restrictive as they seem? 200
hackArcana @hackarcana.bsky.social · 16/09/2026One week to go 🔐 Free Live Demo: Cloud Security for Kubernetes® 📅 Sep 23, 7 PM CEST 🎟 Free Haven’t signed up yet? You can still join us here: hackarcana.com/webinar-secu... 000
hackArcana @hackarcana.bsky.social · 15/09/2026Need a reason to join our live demo? Here are 5: 1️⃣ real-world scenarios 2️⃣ live walkthrough 3️⃣ experienced instructors 4️⃣ live Q&A 5️⃣ free :) 📅 Sep 23, 7 PM CEST Sign up here 👉 hackarcana.com/webinar-secu... 000
hackArcana @hackarcana.bsky.social · 11/09/2026🔐 Free Live Demo: Cloud Security for Kubernetes® See practical cloud security scenarios in action with Jarosław Jedynak & Michał Leszczyński. 📅 Sep 23, 7 PM CEST 210
hackArcana @hackarcana.bsky.social · 03/09/2026🔐 Practical Deep Dive into Kubernetes Security is back! 2nd edition starts Oct 21: → 6 live sessions → dedicated K8s lab → hands-on attack & defense scenarios → ~18h of practical training Registration is now open 👇 100
hackArcana @hackarcana.bsky.social · 11/08/2026We’ve just added two new exercises to hackArcana! 1 Ocean Waves - a 50-point challenge where you receive an encoded audio message from another ship while sailing across the ocean. 2. Scanlines of PNG - a steganography task with a flag hidden inside a PNG file. Ready to solve them? ;) 100
hackArcana @hackarcana.bsky.social · 04/08/2026The second live session of the Python Cyber Summer Camp is happening tomorrow! We’ll meet on Wednesday, August 5, at 7:00 PM CEST for another deep dive into the stranger and more surprising corners of Python. And yes, you can still join us :) hackarcana.com/py-summer 200
hackArcana @hackarcana.bsky.social · 13/07/2026Help students take the next step toward a career in cybersecurity. 🐍🔐 Sponsor tickets for Python Cyber Summer Camp 2026 by @gynvael.bsky.social, and hackArcana will add the same number of tickets, doubling your impact. hackarcana.com/py-summer-sp... 000
hackArcana @hackarcana.bsky.social · 08/06/2026We kick off tomorrow! ✔️ 6 weeks ✔️ Hands-on labs ✔️ Your own Kubernetes cluster ✔️ Live sessions with experienced instructors Learn more here: hackarcana.com/q2-2026-k8s Use code K8S-HBS-10 for 10% off (valid only today, EoD) 000
hackArcana @hackarcana.bsky.social · 05/06/2026⏳ 4 days left. Practical Deep Dive into Kubernetes Security starts on Tuesday. ✔️ 6 weeks of hands-on labs ✔️ Your own Kubernetes cluster ✔️ Live sessions with security practitioners 200
hackArcana @hackarcana.bsky.social · 29/05/2026That's why we want to first show all misconfigurations. Then we will show how to attack them. And then, obviously, we will teach you how to prevent them and stop attackers from abusing them. Use code K8S-HBS-10 for 10% off. hackarcana.com/q2-2026-k8s 010
hackArcana @hackarcana.bsky.social · 21/05/2026Most Kubernetes security courses teach theory. This one is hands-on from day one: labs, real attack paths, RBAC abuse, runtime security, networking & container internals. Led live by experienced & certified security engineers 🔐 Use code K8S-HBS-10 for 10% off. 100
hackArcana @hackarcana.bsky.social · 20/05/2026Two new RE exercises just dropped 🔥 🥉 RiskY Bronze 🥈 RiskY Silver A bit retro, on the simpler side, and focused on reversing compiled Python 2.7 internals. Have fun! hackarcana.com/exercises 000
hackArcana @hackarcana.bsky.social · 15/05/2026Challenge down. Want to go deeper? Jump into a lab-based 6-week live security workshop covering build, deploy, runtime, RBAC, networking, and low-level container internals. Use code K8S-HBS-10 for 10% off. 100
hackArcana @hackarcana.bsky.social · 13/05/2026Quick reminder: tomorrow at 7 PM CEST @gynvael.bsky.social is hosting a live walkthrough of the Cloud Security Challenge for Kubernetes with the authors. Demo Live Hacking + Q&A Sign up here: hackarcana.com/livestream-m... 000
hackArcana @hackarcana.bsky.social · 07/05/2026We misconfigured a Kubernetes environment. On May 14th, we’ll show how it was broken. Live Hacking Demo + Q&A: K8s misconfigs, attack paths & privilege escalation. 👇 Link in comments 100
hackArcana @hackarcana.bsky.social · 29/04/2026We misconfigured a K8s environment and today at 6 PM CEST, we open the challenge. What happens next depends on what you notice 🔍 Want to be there from the start? Sign up now. hackarcana.com/invite-29th-...hackarcana.com 000
hackArcana @hackarcana.bsky.social · 23/04/2026We set up a Kubernetes cluster. It looks fine at first glance. But one small detail changes everything. Will you be able to spot it? If you haven't joined yet, sign up for our "Cloud Security Challenge for Kubernetes"! 👉 link in the comment. 100
hackArcana @hackarcana.bsky.social · 16/04/2026📣 Registration for the "Cloud Security Challenge for Kubernetes" is now open! Break into a vulnerable cluster, escalate privileges, and extract secrets – just like in real-world attacks. Free / Intermediate / ~2h / Hands-on / Starts April 29 Think you can break it? 👉 hackarcana.com/k8s-challenge 010
hackArcana @hackarcana.bsky.social · 16/04/2025🚨 Learning C/C++? Beware of this classic trap: unspecified argument evaluation order! Different compilers = different results See why a specific tiny piece of code can behave wildly differently here hackarcana.com/code-print 000
hackArcana @hackarcana.bsky.social · 07/04/2025🟢 It’s not too late to join us! The Mastering Binary Files and Protocols workshop starts tomorrow (Apr 8) at 6pm CEST. If you sign up today, you’ll still get: ✅ A spot in all of the live sessions ✅ Full access to all recordings ✅ 10% off with code MBF-HBS-10 Register here: hackarcana.com/bin 000
hackArcana @hackarcana.bsky.social · 04/04/2025👇7 benefits of joining Mastering Binary Files and Protocols 👇 ✔️ Real binary skills ✔️ Faster debugging ✔️ Security mindset ✔️ Independence ✔️ Career boost ✔️ Problem-solving ✔️ Data insight 🗓️ Starts April 8 🎥 Live sessions + downloadable recordings 💸 MBF-HBS-10 = 10% off until April 7 🔗 hackarcana.com/bin 000
hackArcana @hackarcana.bsky.social · 02/04/2025Come tonight at 7PM CEST! If you're into: 🧠 reverse engineering 🛠 understanding how things work 🧩 solving CTF-style puzzles — you'll love this session with @gynvael.bsky.social ! 🔴 www.youtube.com/live/xVrxfEk...youtube.com🎮 Live CTF: Solving "Gamepad" from Gynvael’s Collection | hackArcana ChallengeYouTube video by GynvaelEN 000
hackArcana @hackarcana.bsky.social · 31/03/2025🚨 Last hours to join our free webinar with a legend – Gynvael Coldwind! What’s inside? • Real file handling mistakes • Weird path behavior • Hacker’s perspective on files • Even a bit of forensics 👀 🧩 Perfect for devs, admins, hackers & the curious. ⏳ Time’s running out → hexarcana.ch/lp/files 000
hackArcana @hackarcana.bsky.social · 27/03/2025What will you learn in this webinar? 🧩 What is a file—really? 🧠 Hidden file features & common dev mistakes 📁 Weird world of file paths (yes, it gets strange) 🔍 A glimpse into digital forensics 🗓 March 31 | ⏰ 8 PM CEST | 💸 Free Save your spot 👉 hexarcana.ch/lp/files/ and see you on Monday! 000
hackArcana @hackarcana.bsky.social · 21/03/2025🚨 <script> isn’t just text—it’s a command! Want it to show up in HTML? You have to escape it: ✅ <script> → <script> Escaping keeps hackers out and your code clean 🔐 Learn why it matters & how it works in our latest article 👇 🔗 Read here: hackarcana.com/article/why-... 000
Reposted by hackArcanaGynvael Coldwind @gynvael.bsky.social · 14/03/2025If you like CTF challenges, we've been steadily pushing some of my favorite tasks to my new edu site: hackarcana.com/exercises From top to bottom: Linux RE, 2x JS RE, USB PCAP, ZIP/crypto, DOS/VGA RE, 2x BMP image stegano, 5x BMP file format stegano, Python 2.7 RE, and ROP RE HFGL 0185
hackArcana @hackarcana.bsky.social · 13/03/2025Did you know pressing CTRL+D can make some C++ programs crash or loop forever? 🤯 That’s because cin enters an error state instead of truly “closing” input. Most apps handle it well—but not all 🙅 Want to see why? Read our recent article 👉 hackarcana.com/article/ctrl... 000
hackArcana @hackarcana.bsky.social · 11/03/2025We've published a new article! ⌨️ Linux Terminal: CTRL+D is like pressing ENTER hackarcana.com/article/ctrl... Enjoy!hackarcana.com 000
hackArcana @hackarcana.bsky.social · 08/03/2025Pro tip for protocol hand-crafting lovers: Having problems sending \r\n on Linux? Press CTRL+V to escape the next key press, and follow it up with ENTER to get \r. CTRL+V, ENTER, ENTER → \r\n 092
hackArcana @hackarcana.bsky.social · 07/03/2025⚠️ Sanitizing input is tricky! Removing unwanted HTML tags prevents XSS, but won’t stop SQL injections. To keep your app safe, use validation, escaping, and sanitization where they belong 🔐 🔗 Read more here: hackarcana.com/article/sani... 000
hackArcana @hackarcana.bsky.social · 07/03/2025We've got 200% increase in players overnight! Well, yes, it's 2→4 on the scoreboard, but we're just starting :) And we have more challenges on the way, a lot more! 000
hackArcana @hackarcana.bsky.social · 05/03/2025For your enjoyment we're slowly adding @gynvael.bsky.social old challenges to our archive: hackarcana.com/exercises Slowly... becuase we test each one and re-flag them. Some fun ones are yet to come! Enjoy! P.S. If you like scoreboards, here's a chance to grab top1 easily.hackarcana.com 020
hackArcana @hackarcana.bsky.social · 04/03/2025🚀 New blog post on hackArcana! Learn about: 🔹 Validation vs. escaping vs. filtering 🔹 When to use each method 🔹 Common input handling mistakes 🔗 Read here: hackarcana.com/article/sani...hackarcana.com 000
hackArcana @hackarcana.bsky.social · 04/03/2025Hey everyone! 👋 This is the official account of hackarcana.com — the educational portal from HexArcana Cybersecurity (hexarcana.ch). If you want to up your skills in hands-on cybersec, click follow! 000