Bug: Bounty Tutorial Exclusive

The Exclusive Bug Bounty Masterclass: From Beginner to Pro Hunter Welcome to the elite world of ethical hacking. If you are reading this, you aren’t just looking for a "top 10 tools" list; you are looking for the exclusive methodology used by six-figure bounty hunters to find vulnerabilities that automated scanners miss. This tutorial moves beyond the basics of SQL injection and XSS. We are diving into the mindset, the reconnaissance, and the exploitation techniques that define the modern bug bounty landscape. Phase 1: The Reconnaissance Engine (The Pro’s Edge) Most beginners fail because they hack the same targets as everyone else. The "exclusive" secret? Attack surface expansion. You want to find the assets the company forgot they owned. 1. Advanced Subdomain Discovery Don't just use subfinder . Chain your tools to find "hidden" domains: ASN Mapping: Use amass to find the Autonomous System Number (ASN) of your target. This reveals the entire IP range owned by the company. Certificate Transparency (CT) Logs: Search through crt.sh to see every SSL certificate ever issued to the company. This often reveals dev, staging, and UAT environments that are poorly guarded. 2. The JavaScript Goldmine Modern web apps are heavy on JS. Deep-diving into .js files can reveal: Hidden API endpoints. Hardcoded developer credentials or API keys. Logic for "hidden" features. Pro Tip: Use LinkFinder to extract endpoints from JS files automatically. Phase 2: Vulnerability Focus—The "High Value" Bugs Boutique bounty hunters focus on bugs that carry a "Critical" or "High" severity tag. These are the ones that pay for the beach house. 1. Broken Object Level Authorization (BOLA/IDOR) This is currently the #1 bug in API-centric applications. The Scenario: You are logged in as User A. You view your profile at /api/v1/user/100 . The Hack: Change the ID to 101 . If you see User B’s private data, you’ve hit the jackpot. Exclusive Strategy: Look for GUIDs or UUIDs. While they look random, they can sometimes be found in public JS files or via other "lower-tier" API calls. 2. Server-Side Request Forgery (SSRF) SSRF allows you to make the server "talk" to its internal network. Target: Image uploaders, URL parsers, or PDF generators. The Goal: Try to point the server to http://169.254.169 (the AWS metadata service). If it returns data, you have full access to the cloud instance credentials. Phase 3: The Art of the Report You can find the best bug in the world, but if your report is messy, you won't get paid. Executive Summary: Explain the business risk. "I can steal all user data" sounds better than "Found an IDOR." Clear Reproduction Steps: Use numbered lists. If a triage member can’t reproduce it in 5 minutes, they might close it as "Informational." Video PoC: Always record your screen. A video Proof of Concept (PoC) is undeniable evidence. Phase 4: The Exclusive "Mental Game" Bug hunting is 90% failure and 10% adrenaline. To stay in the game: Specialization over Generalization: Become the "IDOR guy" or the "GraphQL expert." Deep knowledge in one area beats shallow knowledge in ten. Automate the Boring Stuff: Write bash scripts to handle your recon while you sleep. Collaboration: Join private Slack or Discord groups. The best "exclusive" tips are shared between peers, not on public forums. Summary Checklist for your First Hunt: Define the scope (Stick to what is allowed!). Map the ASN and find "forgotten" subdomains. Fingerprint the tech stack (Wappalyzer/BuiltWith). Test every API endpoint for Authorization (BOLA). Check for sensitive data in JS files. Write a professional, high-impact report. The path to your first $1,000 bounty starts with curiosity and ends with persistence. Happy hunting.

The Asymmetric War: An Exclusive Guide to Mastering Bug Bounty Hunting In the digital age, the line between a hacker and a guardian has blurred. Bug bounty hunting is the crucible where this new alchemy happens: turning vulnerabilities into value, and curiosity into cash. Unlike a standard penetration test—which is a static, checklist-driven audit—bug bounty hunting is an asymmetric war of creativity. You are not just following a script; you are outthinking systems designed by engineers who assumed they were unbreakable. This guide is not about running a scanner and copying-pasting results. It is about the methodology, the mindset, and the minute details that separate the top 1% of hunters from the noise. Phase 1: The Pre-Flight Checklist (Reconnaissance) Exclusive hunters know that 80% of success is determined before they write a single line of HTTP request. Reconnaissance is not passive; it is active discovery. 1. Scope is Your Constitution Before touching a single packet, read the program’s policy on HackerOne, Bugcrowd, or a private invite. Is Google in scope? Yes. Is *.google.com the same as googleplex.com ? Absolutely not. Use amass or subfinder to map subdomains, but always filter them against the scope’s wildcard rules. Violating scope is the fastest way to get banned, not rewarded. 2. The Art of Subdomain Enumeration Most beginners stop at subdomain.brute . Exclusive hunters use permutations .

Tool stack: assetfinder (fast), shuffledns (massive wordlists), chaos (Project Discovery’s dataset). The trick: Run alterx on discovered subdomains. If api.target.com exists, guess dev-api.target.com , staging-api.target.com , v1.api.target.com . Development servers often have debug modes, verbose errors, or default credentials.

3. Technology Fingerprinting Don’t attack blindly. Use httpx to probe for status codes, titles, and technologies. If you see Server: Apache/2.4.49 , you know CVE-2021-41773 (Path Traversal) is worth a test. If you see X-Powered-By: PHP/7.4 , look for PHP-specific quirks (e.g., ?a[]=1 for type juggling). Phase 2: The Mindset of a Vulnerability Discoverer Bug bounty is not about tools; it’s about contextual deviation . A parameter named redirect_url might be a normal feature. But a redirect_url that takes an absolute URI like https://evil.com is an Open Redirect. A file parameter that fetches ../../../etc/passwd is a Path Traversal. You must train your eye to see what the developer forgot to check. The 3 Core Questions to Ask for Every Input: bug bounty tutorial exclusive

Is this input reflected back to me? (XSS, SSTI) Is this input used to access a resource? (IDOR, LFI, SSRF) Does this input change the server’s state? (CSRF, Privilege Escalation)

Phase 3: High-Impact Vulnerability Deep Dives Skip the low-hanging X-Forwarded-For: 127.0.0.1 spoofs. Here are three exclusive, high-payout vectors: 1. Insecure Direct Object References (IDOR) on UUIDs Developers have learned that sequential IDs ( /user/123 ) are bad. So they use UUIDs: /api/invoice/550e8400-e29b-41d4-a716-446655440000 . The myth is that UUIDs are unguessable. The exploit: They are not if they are exposed elsewhere. Check JavaScript source maps, WebSocket messages, or browser local storage for a different user’s UUID. Then, modify the endpoint. Also, try v2 of the API: /api/v2/invoice/550e8400... . Versioning often breaks access controls. 2. Server-Side Request Forgery (SSRF) via Parser Confusion Many SSRF filters block http://169.254.169.254 (AWS metadata). Exclusive hunters bypass this by abusing URL parsers.

Try: http://0.0.0.0 (resolves to localhost on many systems). Try: http://⑯⑨⑵⑤④⑯⑨⑵⑤④/ (decimal octal encoding of 169.254.169.254). The killer trick: If the app fetches images from a URL, give it http://localhost:8080/admin or http://metadata.google.internal . If the server responds with a different error than "connection refused," you have a blind SSRF. The Exclusive Bug Bounty Masterclass: From Beginner to

3. GraphQL Introspection & Batching GraphQL endpoints (often /graphql or /v1/graphiql ) are goldmines.

Run: {__schema{types{name,fields{name}}}} to dump the entire API structure. Look for mutations like updateUserRole , deletePost , createAdmin . These are often unauthenticated if the developer forgot to apply directives. Batching attack: Send 100 {user(id:1){email}} queries in one request. The server might authorize the first but not the 99th due to race conditions.

Phase 4: The Automation Edge (But Not the Way You Think) Automation is a multiplier, not a replacement. Do not run nuclei -t ~/nuclei-templates/ -u target.com – that’s the equivalent of shouting "I’m scanning" and getting rate-limited. Exclusive Automation Stack: We are diving into the mindset, the reconnaissance,

katana for crawling – it handles SPAs and JavaScript-heavy sites better than Burp’s spider. gospider for extracting hidden parameters from ? in JS files. dalfox for parameterized XSS – it does not just check "><script>alert(1)</script> ; it tests context-aware payloads.

The One Custom Script You Need: Write a Python script that takes every URL, extracts every parameter name ( id , user_id , redirect , file , url , next , return_to ), and sends a unique "collaborator" payload for SSRF and blind XSS. This is how you find blind vulnerabilities that don’t show up in the response. Phase 5: Reporting – The Difference Between $500 and $5,000 You found an IDOR that exposes all user addresses. Congratulations. But if you write "IDOR on /api/user/address" as the report, you will get a low severity. The Exclusive Report Template: