Onboarding Lab: Access and Flags

🎓 Ready to start your cybersecurity journey?

Very Easy 05 Dec 2025 Free Access Solution Available

Welcome to HackerDNA Labs! This is your gateway to hands-on cybersecurity learning. Your first challenge is designed to teach you how our platform works - from navigating challenges to finding and submitting flags. Perfect to understand the platform mechanics before diving into real hacking challenges. 🚀

Flags

Points

68%

Success Rate

Start Your Challenge

Launch your dedicated machine to begin hacking

~1-2 min setup

Dedicated server

Private instance

Industry standard

Learn

Welcome to HackerDNA

Master offensive security through hands-on practice. Each lab hides a secret code called a flag.

flag

HackerDNA offers labs with authentic exploits and vulnerabilities from real-world systems. Find the vulnerability, capture the flag, prove you owned it.

Join thousands of security professionals training on production-grade vulnerabilities.

Read the Learn section above ⬆ and answer the question below ⬇

Step 1

Learn

Unbreakable Randomness

UUID stands for:

universally unique identifier

Example: a1b2c3d4-e5f6-7890-abcd-ef1234567890

With 2¹²² possible combinations, brute-forcing a UUID is mathematically impossible. That's why they secure session tokens, API keys, and database records.

In pentests, you'll encounter UUIDs protecting user sessions. Learning to work with them is part of web security fundamentals.

Read the Learn section above ⬆ and answer the question below ⬇

Step 2

Learn

Secrets Have Predictable Hiding Spots

In HackerDNA labs, flags are typically stored in:

flag.txt

Common locations to check:

/flag.txt - web root
/home/flag-user.txt - user directories
/root/flag-root.txt - root's home (requires privilege escalation)

HackerDNA labs progress from web basics to advanced exploitation - SQL injection, RCE, privilege escalation, and more.

Read the Learn section above ⬆ and answer the question below ⬇

Step 3

Learn

Your First Capture

Time to get your hands dirty.

Open the Target URL in your browser
Click the green "Access the Flag" button
Copy the UUID from flag.txt
Paste it below and submit

This is the first of 170+ labs. Next up: real vulnerabilities, real exploits, real skills.

Read the Learn section above ⬆ and answer the question below ⬇

flag.txt

+5 pts