Essential Cybersecurity Commands and Techniques for Bug Bounty Hunters

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Introduction

Bug bounty hunting requires a deep understanding of cybersecurity tools, commands, and methodologies. Whether you’re working in a SOC, red teaming, or ethical hacking, mastering key Linux/Windows commands and vulnerability exploitation techniques is crucial. This guide covers verified commands, code snippets, and step-by-step instructions to enhance your cybersecurity skills.

Learning Objectives

  • Master essential Linux and Windows commands for penetration testing.
  • Understand vulnerability exploitation and mitigation techniques.
  • Learn how to use cybersecurity tools effectively in bug bounty hunting.

You Should Know

1. Network Scanning with Nmap

Command:

nmap -sV -A -T4 target.com

What it does:

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

Step-by-Step Guide:

  1. Install Nmap if not already present (sudo apt install nmap on Linux).

2. Run the command against your target domain/IP.

3. Analyze open ports, services, and potential vulnerabilities.

2. Exploiting SQL Injection with SQLmap

Command:

sqlmap -u "http://target.com/page?id=1" --dbs

What it does:

  • Tests for SQL injection vulnerabilities.
  • --dbs: Lists available databases if successful.

Step-by-Step Guide:

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

2. Run SQLmap to enumerate databases.

  1. Use `–dump` to extract data if exploitation is confirmed.

3. Password Cracking with John the Ripper

Command:

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

What it does:

  • Performs dictionary attacks on password hashes.
  • Uses the `rockyou.txt` wordlist for common passwords.

Step-by-Step Guide:

1. Extract password hashes (e.g., from `/etc/shadow`).

2. Save hashes to `hashes.txt`.

  1. Run John the Ripper to crack weak passwords.

4. Windows Privilege Escalation with PowerUp

Command (PowerShell):

Invoke-AllChecks

What it does:

  • Identifies misconfigurations for privilege escalation.
  • Part of the PowerUp.ps1 script in the PowerSploit framework.

Step-by-Step Guide:

1. Download and import PowerUp.ps1.

2. Run `Invoke-AllChecks` to list vulnerabilities.

3. Exploit weak service permissions or unquoted paths.

5. Cloud Hardening in AWS

Command (AWS CLI):

aws iam update-account-password-policy --minimum-password-length 12

What it does:

  • Enforces a 12-character minimum password policy.
  • Mitigates brute-force attacks on AWS accounts.

Step-by-Step Guide:

1. Configure AWS CLI with credentials.

2. Apply the command to strengthen password policies.

3. Enable MFA for additional security.

6. API Security Testing with OWASP ZAP

Command:

zap-cli quick-scan -s xss,sqli http://target.com/api

What it does:

  • Scans APIs for XSS and SQL injection flaws.
  • Uses OWASP ZAP’s automated scanning capabilities.

Step-by-Step Guide:

1. Install ZAP (`docker pull owasp/zap2docker`).

2. Run the scan against the API endpoint.

3. Review results for critical vulnerabilities.

7. Vulnerability Mitigation with Patch Management

Command (Linux):

sudo apt update && sudo apt upgrade -y

What it does:

  • Updates and patches all installed packages.
  • Reduces exposure to known vulnerabilities.

Step-by-Step Guide:

1. Run the command regularly on Linux systems.

  1. Monitor for critical updates (e.g., apt list --upgradable).

3. Schedule automated patches using cron jobs.

What Undercode Say

  • Key Takeaway 1: Automation tools like Nmap and SQLmap save time but require ethical use.
  • Key Takeaway 2: Regular system hardening (e.g., AWS policies, patch management) prevents low-hanging exploits.

Bug bounty hunting is evolving with AI-driven attacks and cloud vulnerabilities. Future trends include:
– AI-Powered Exploits: Attackers leveraging machine learning to bypass traditional defenses.
– Zero-Day Surge: Increased focus on undisclosed vulnerabilities in bug bounty programs.
– Cloud-Native Threats: Misconfigured serverless and containerized apps becoming prime targets.

Stay ahead by mastering these techniques and adapting to emerging threats.

IT/Security Reporter URL:

Reported By: Sumit B – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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