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Search hundreds of walkthroughs and challenges by security category or difficulty. Whether you're a beginner or a seasoned pro, there's something for everyone!
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Cyber Security
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1,538 results
You've been called in to assess an OT environment.
easy
1-2 hrs
medium
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Learn how to triage escalated alerts and respond to cyber threats.
Learn to automate detection rules development and how AI can boost this process effectively.
Learn the basics of source code review for PHP.
Explore the vulnerabilities AI introduces, how attackers exploit it, and how defenders fight back.
Read web app source like an attacker: trace user input to dangerous sinks, triage with Semgrep.
Exploit pedit COW, a copy-on-write flaw in the Linux kernel's packet-editing action.
Do you have what it takes to defeat me and claim your prize?
Can you bypass the engine?
Triage alerts, reassemble streams, extract files, and detect protocol abuse via Wireshark & TShark.
Explore how security analysts can use CTI in their daily operations.
Learn the foundational concepts, approaches, and techniques of threat hunting.
NoScope found an Alf.io RCE zero-day (CVE-2026-35482). Exploit it manually and watch AI solve it.
Explore the duties and exciting opportunities of a SOC Level 2 analyst.
A container without its own role inherits the host's. See how this is an issue of its own.
IMDSv1 turns any SSRF bug into credential theft. Find it, fix it, and build without it.
Patch debt accumulates silently. Learn to find, fix, and prevent it using Systems Manager.
An open management port is a standing invitation. Find it, close it, and build without it.
VPC Flow Logs were not enabled. The network was invisible.
Security groups protect instances. NACLs protect subnets. This one was forgotten.
The subnet is named private. The route table says otherwise. Find it, fix it, and build it right.
Sharing is caring, but sometimes oversharing is a security breach.
Learn how to ensure your Security Groups are well-scoped.
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