Launch your dedicated machine to begin hacking
- 1Create a free account, then click "Start Lab"You'll get your own private machine with an IP address
- 2Explore the targetOpen the IP in your browser and look for vulnerabilities
- 3Find and submit flagsFlags are secret text strings hidden in the system - paste them below to score
- ~1-2 min setup
- Private instance
- 30 min per session. Restart it for free, as often as you like.
Multi-stage penetration testing simulates how real-world attackers compromise enterprise systems through a chain of vulnerabilities rather than a single exploit. In professional security assessments, testers must combine web application enumeration, credential analysis, authentication bypass, and privilege escalation to demonstrate the full impact of security weaknesses. This approach reveals how seemingly minor information disclosures can cascade into complete system compromise.
Web Application Enumeration and Reconnaissance
The first phase of any penetration test involves thorough reconnaissance of the target's web presence. Directory discovery tools like gobuster and ffuf reveal hidden endpoints, backup files, and administrative interfaces. Information disclosure vulnerabilities - where applications expose internal details through error messages, comments in source code, or publicly accessible files - often provide the credentials or configuration details needed for the next stage of the attack. Understanding how to methodically enumerate a web application is fundamental to identifying exploitable weaknesses.
Password Cracking and Authentication Attacks
Discovered credentials are frequently stored as hashes or protected by weak encryption. Tools like John the Ripper, Hashcat, and online hash databases enable security testers to recover plaintext passwords from various hash formats. Understanding hash types, selecting appropriate wordlists, and applying rule-based attacks are essential skills for penetration testers. Cracked credentials often provide SSH access or administrative privileges that open the door to the underlying system.
CVE Research and Privilege Escalation
Once initial access is gained, penetration testers enumerate the system for known vulnerabilities (CVEs) in installed software and privilege escalation vectors. Outdated packages, misconfigured services, and vulnerable SUID binaries can all provide paths to root access. Researching CVEs, understanding their exploitation requirements, and adapting public exploits to the target environment are advanced skills that separate effective penetration testers from script kiddies. The complete methodology - from external reconnaissance to root access - demonstrates why defense in depth is critical for enterprise security.
What You Will Learn
- Learn web application enumeration and directory discovery techniques
- Practice information disclosure exploitation for credential gathering
- Develop password cracking skills using industry-standard tools
- Research and exploit CVEs in production environments
- Master Linux privilege escalation through multiple vectors
- Understand multi-stage attack chains used in professional penetration testing
Prerequisites
Credited contributors
These hackers reported issues, improved content, and helped harden this page.
