Ethical Hacking Methodology

Purpose

Master the complete penetration testing lifecycle from reconnaissance through reporting. This skill covers the five stages of ethical hacking methodology, essential tools, attack techniques, and professional reporting for authorized security assessments.

Prerequisites

Required Environment

• Kali Linux installed (persistent or live)
• Network access to authorized targets
• Written authorization from system owner

Required Knowledge

• Basic networking concepts
• Linux command-line proficiency
• Understanding of web technologies
• Familiarity with security concepts

Outputs and Deliverables

1. Reconnaissance Report - Target information gathered
2. Vulnerability Assessment - Identified weaknesses
3. Exploitation Evidence - Proof of concept attacks
4. Final Report - Executive and technical findings

Core Workflow

Phase 1: Understanding Hacker Types

Classification of security professionals:

White Hat Hackers (Ethical Hackers)

• Authorized security professionals
• Conduct penetration testing with permission
• Goal: Identify and fix vulnerabilities
• Also known as: penetration testers, security consultants

Black Hat Hackers (Malicious)

• Unauthorized system intrusions
• Motivated by profit, revenge, or notoriety
• Goal: Steal data, cause damage
• Also known as: crackers, criminal hackers

Grey Hat Hackers (Hybrid)

• May cross ethical boundaries
• Not malicious but may break rules
• Often disclose vulnerabilities publicly
• Mixed motivations

Other Classifications

• Script Kiddies: Use pre-made tools without understanding
• Hacktivists: Politically or socially motivated
• Nation State: Government-sponsored operatives
• Coders: Develop tools and exploits

Phase 2: Reconnaissance

Gather information without direct system interaction:

Passive Reconnaissance

# WHOIS lookup
whois target.com

# DNS enumeration
nslookup target.com
dig target.com ANY
dig target.com MX
dig target.com NS

# Subdomain discovery
dnsrecon -d target.com

# Email harvesting
theHarvester -d target.com -b all

Google Hacking (OSINT)

# Find exposed files
site:target.com filetype:pdf
site:target.com filetype:xls
site:target.com filetype:doc

# Find login pages
site:target.com inurl:login
site:target.com inurl:admin

# Find directory listings
site:target.com intitle:"index of"

# Find configuration files
site:target.com filetype:config
site:target.com filetype:env

Google Hacking Database Categories:

• Files containing passwords
• Sensitive directories
• Web server detection
• Vulnerable servers
• Error messages
• Login portals

Social Media Reconnaissance

• LinkedIn: Organizational charts, technologies used
• Twitter: Company announcements, employee info
• Facebook: Personal information, relationships
• Job postings: Technology stack revelations

Phase 3: Scanning

Active enumeration of target systems:

Host Discovery

# Ping sweep
nmap -sn 192.168.1.0/24

# ARP scan (local network)
arp-scan -l

# Discover live hosts
nmap -sP 192.168.1.0/24

Port Scanning

# TCP SYN scan (stealth)
nmap -sS target.com

# Full TCP connect scan
nmap -sT target.com

# UDP scan
nmap -sU target.com

# All ports scan
nmap -p- target.com

# Top 1000 ports with service detection
nmap -sV target.com

# Aggressive scan (OS, version, scripts)
nmap -A target.com

Service Enumeration

# Specific service scripts
nmap --script=http-enum target.com
nmap --script=smb-enum-shares target.com
nmap --script=ftp-anon target.com

# Vulnerability scanning
nmap --script=vuln target.com

Common Port Reference

Phase 4: Vulnerability Analysis

Identify exploitable weaknesses:

Automated Scanning

# Nikto web scanner
nikto -h http://target.com

# OpenVAS (command line)
omp -u admin -w password --xml="<get_tasks/>"

# Nessus (via API)
nessuscli scan --target target.com

Web Application Testing (OWASP)

• SQL Injection
• Cross-Site Scripting (XSS)
• Broken Authentication
• Security Misconfiguration
• Sensitive Data Exposure
• XML External Entities (XXE)
• Broken Access Control
• Insecure Deserialization
• Using Components with Known Vulnerabilities
• Insufficient Logging & Monitoring

Manual Techniques

# Directory brute forcing
gobuster dir -u http://target.com -w /usr/share/wordlists/dirb/common.txt

# Subdomain enumeration
gobuster dns -d target.com -w /usr/share/wordlists/subdomains.txt

# Web technology fingerprinting
whatweb target.com

Phase 5: Exploitation

Actively exploit discovered vulnerabilities:

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