Mastering Bug Bounty: Essential Techniques, Tools, and Commands for Ethical Hackers

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Introduction:

Bug bounty programs have become a cornerstone of modern cybersecurity, enabling organizations to crowdsource vulnerability discovery while rewarding ethical hackers. This article dives into proven methodologies, essential tools, and actionable commands to help you excel in bug hunting—whether you’re targeting web apps, APIs, or cloud infrastructure.

Learning Objectives:

  • Learn critical bug bounty reconnaissance techniques.
  • Master command-line tools for vulnerability scanning and exploitation.
  • Understand how to validate and report findings effectively.

1. Reconnaissance with Subdomain Enumeration

Command:

subfinder -d example.com -o subdomains.txt && assetfinder --subs-only example.com >> subdomains.txt

What This Does:

Combines `subfinder` and `assetfinder` to discover subdomains, a crucial first step in bug bounty hunting.

Steps:

1. Install tools via `go install github.com/projectdiscovery/subfinder/v2/cmd/subfinder@latest`.

  1. Run the command to aggregate results into subdomains.txt.

3. Use `httpx` to probe live hosts:

cat subdomains.txt | httpx -silent -status-code -o live_hosts.txt

2. Vulnerability Scanning with Nuclei

Command:

nuclei -u https://example.com -t cves/ -severity critical,high -o nuclei_results.txt

What This Does:

Runs Nuclei, a fast vulnerability scanner, to check for known CVEs.

Steps:

1. Update templates: `nuclei -update-templates`.

  1. Scan with severity filters to prioritize critical issues.

3. Exploiting SQL Injection with SQLmap

Command:

sqlmap -u "https://example.com/login?id=1" --risk=3 --level=5 --batch

What This Does:

Automates SQL injection testing.

Steps:

1. Use `–batch` for non-interactive mode.

2. Add `–dbs` to list databases if vulnerable.

4. API Security Testing with Postman

Technique:

  • Test for Broken Object Level Authorization (BOLA) by tampering with IDs: 
    curl -X GET https://api.example.com/user/1234 -H "Authorization: Bearer <token>"

Steps:

  1. Replace `1234` with another user’s ID to check access controls.

5. Cloud Misconfiguration Checks

AWS S3 Bucket Audit:

aws s3 ls s3://bucket-name --no-sign-request

What This Does:

Checks for publicly accessible S3 buckets.

Steps:

1. Run with `–no-sign-request` to test anonymous access.

6. Privilege Escalation in Linux

Command:

sudo -l 
find / -perm -4000 2>/dev/null

What This Does:

Lists exploitable sudo rules and SUID binaries.

7. Reporting with Markdown Templates

Template:

 Vulnerability: SQL Injection 
Target: `https://example.com/login` 
Steps to Reproduce: [Detailed steps] 
Impact: Data leakage

What Undercode Say:

  • Key Takeaway 1: Automation (e.g., Nuclei, SQLmap) is essential for scaling bug bounty efforts.
  • Key Takeaway 2: Misconfigurations in APIs/cloud services are low-hanging fruit.

Analysis:

The rise of AI-driven tools (e.g., Burp Suite’s Scanner) will further democratize bug hunting, but human ingenuity in chaining vulnerabilities remains irreplaceable. Expect more programs to focus on cloud/API security as attacks shift left.

Prediction:

By 2025, 60% of bug bounty payouts will target cloud misconfigurations and AI model exploits, with automation tools becoming mandatory for competitive hunters.

Tools referenced: Subfinder, Nuclei, SQLmap.

IT/Security Reporter URL:

Reported By: Phyowathonewin Bugbounty – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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