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Introduction:
Bug bounty hunting has evolved into a lucrative cybersecurity career path, with platforms like HackerOne and Bugcrowd offering substantial rewards for identifying vulnerabilities. This guide provides the technical command arsenal that separates successful hunters from casual participants, covering reconnaissance, exploitation, and proof-of-concept development.
Learning Objectives:
- Master essential command-line tools for automated reconnaissance and vulnerability scanning
- Develop techniques for bypassing security defenses and validating exploit chains
- Learn to document and report findings effectively for maximum bounty rewards
You Should Know:
1. Subdomain Enumeration Mastery
subfinder -d target.com -o subdomains.txt amass enum -d target.com -brute -w wordlist.txt -o amass_results.txt assetfinder --subs-only target.com | tee assetfinder.txt
Subdomain discovery forms the foundation of bug bounty reconnaissance. Subfinder passively discovers subdomains using multiple sources, while Amass performs DNS enumeration and brute-forcing. Assetfinder quickly identifies associated assets. Combine these tools to create comprehensive target scope coverage before proceeding to vulnerability assessment.
2. Web Application Firewall Bypass Techniques
nuclei -u https://target.com -t ~/nuclei-templates/waf-bypass/ ffuf -w payloads.txt -u https://target.com/FUZZ -H "X-Forwarded-For: 127.0.0.1" -mc all sqlmap -u "https://target.com/page?id=1" --tamper=space2comment --random-agent --level=5
WAF bypass requires specialized payload delivery. Nuclei templates test for common bypass patterns, while FFuf fuzzes endpoints with encoded payloads. Sqlmap’s tamper scripts automatically obfuscate SQL injection attempts. Always rotate user agents and leverage header injection techniques to evade security controls.
3. API Endpoint Discovery and Testing
katana -u https://target.com/api/ -d 5 -f url | grep api > endpoints.txt
arjun -u https://target.com/api/v1/user --get --headers auth:bearer_token
curl -X PUT https://target.com/api/v1/admin -H "Authorization: Bearer $token" -d '{"role":"admin"}'
API testing requires comprehensive endpoint discovery and authentication bypass testing. Katana crawls for API paths, while Arjun identifies hidden parameters. Manual curl testing validates privilege escalation vulnerabilities. Always test for IDOR, broken object level authorization, and excessive data exposure.
4. Cloud Infrastructure Reconnaissance
cloud_enum -k target -k companyname -l cloud_results.txt s3scanner scan --buckets-file my_buckets.txt gcpbucketbrute target --word-list words.txt
Cloud misconfigurations represent critical bounty opportunities. Cloud_enum checks multiple cloud platforms for exposed resources, while specialized tools like s3scanner and gcpbucketbrute identify publicly accessible storage buckets. Always check for sensitive data exposure in cloud storage and improperly configured permissions.
5. JavaScript File Analysis for Hidden Endpoints
waybackurls target.com | grep .js$ | tee js_files.txt curl -s https://target.com/main.js | grep -E "api|token|key|endpoint|auth" > secrets.txt subjs -u https://target.com | httpx -status-code -content-length
JavaScript files often contain hidden API endpoints and sensitive credentials. Waybackurls historical data combined with active subjs discovery identifies JavaScript resources. Pattern matching reveals hardcoded secrets and undocumented functionality. Always analyze minified files using prettier or similar beautification tools.
6. Authentication Bypass and Session Manipulation
burpsuite intruder attack with payloads: ["admin","true","1"] jwt_tool.py eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c -C -d wordlist.txt curl -H "Cookie: session=invalid; admin=true" https://target.com/admin
Session and authentication vulnerabilities frequently yield high-value bounties. Burp Intruder tests for parameter pollution, while jwt_tool manipulates JSON Web Tokens. Manual cookie manipulation tests for insecure session handling. Always test for weak token generation, insufficient session expiration, and privilege escalation via parameter manipulation.
7. Automated Vulnerability Scanning and Validation
nuclei -l targets.txt -t ~/nuclei-templates/ -o findings.txt -severity medium,high,critical nmap -sV --script vuln -iL targets.txt -oA vuln_scan gau target.com | grep ".php" | qsreplace "' OR 1=1--" | httpx -mc 200
Automation accelerates vulnerability discovery but requires validation. Nuclei templates provide extensive coverage, while Nmap’s vuln script checks for known vulnerabilities. Gau with qsreplace generates potential SQL injection points. Always manually verify findings to eliminate false positives before reporting.
What Undercode Say:
- Bug bounty success requires methodological approach combining automated discovery with manual exploitation techniques
- The most lucrative findings often come from business logic flaws that automated tools cannot detect
- Proper documentation and clear proof-of-concept demonstrations significantly increase bounty amounts
The landscape of bug bounty hunting continues to evolve toward more specialized skillsets. While automated tools provide initial surface scanning, the highest bounties are awarded for vulnerabilities requiring deep understanding of application logic and creative exploitation chains. Successful hunters must master both technical commands and the business context of their targets.
Prediction:
Within two years, AI-powered vulnerability discovery will dramatically increase competition in bug bounty programs, pushing hunters toward more complex vulnerability classes requiring human ingenuity. Programs will increasingly prioritize business-impact vulnerabilities over technical findings, with bounties for logic flaws and architectural weaknesses surpassing traditional web application vulnerabilities.
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IT/Security Reporter URL:
Reported By: https://lnkd.in/p/dxaPEWTC – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
