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Introduction:
The recent LinkedIn post by Muhammad Fazriansyah, a Penetration Tester and Red Team Engineer, celebrating a successful bug bounty submission (“Alhamdulillah bug bounty kembali”) highlights the growing trend of ethical hackers turning platform vulnerabilities into cash rewards. Bug bounty hunting is the practice of identifying security flaws in applications and responsibly disclosing them to organizations for a monetary prize. This article breaks down the methodology, tools, and step-by-step commands used by professionals to find these critical bugs, turning curiosity into a lucrative career.
Learning Objectives:
- Understand the core methodology of modern bug bounty hunting, from reconnaissance to reporting.
- Learn to use essential open-source tools for asset discovery and vulnerability scanning.
- Master manual and automated exploitation techniques for common web vulnerabilities.
You Should Know:
- The Art of Reconnaissance: Finding the Hidden Attack Surface
Before firing off a single exploit, professional bug bounty hunters spend up to 80% of their time on reconnaissance. The goal is to map out every subdomain, endpoint, and parameter belonging to the target. A bug often hides in a forgotten development server or an undocumented API endpoint.
Step‑by‑step guide explaining what this does and how to use it.
Start with a domain (e.g., target.com). Use tools like Assetfinder and Amass to find subdomains.
Install Assetfinder
go install github.com/tomnomnom/assetfinder@latest
Find subdomains
assetfinder -subs-only target.com | tee subs.txt
Use Amass for a deeper, more passive scan
amass enum -passive -d target.com -o amass_subs.txt
Combine and sort unique subdomains
cat subs.txt amass_subs.txt | sort -u | httprobe -c 50 -t 3000 > live_hosts.txt
Explanation: `assetfinder` gathers subdomains from certificate transparency logs and search engines. `amass` integrates with more data sources. `httprobe` then checks which of these domains are actually live and accepting HTTP/HTTPS connections, giving you a clean list of targets.
2. Technology Fingerprinting and Visual Inspection
Once you have live hosts, you need to identify the technologies running on them (e.g., WordPress, Nginx, React). This helps you tailor your attack strategy.
Step‑by‑step guide explaining what this does and how to use it.
Use `whatweb` for fingerprinting and `gowitness` to take screenshots for manual review.
Install whatweb
sudo apt-get install whatweb
Run whatweb against all live hosts
whatweb –input-file=live_hosts.txt –log-verbose=whatweb_log.txt
Install and run gowitness for screenshots
go install github.com/sensepost/gowitness@latest
cat live_hosts.txt | gowitness file -f – -P ./screenshots/
Explanation: `whatweb` analyzes HTTP headers, cookies, and page content to tell you exactly what CMS, libraries, and web servers are in use. `gowitness` provides a visual overview, allowing you to quickly spot interesting login panels or unusual directory structures.
3. Vulnerability Scanning: Automating the Low-Hanging Fruit
With your target list refined, it’s time to automate the search for common vulnerabilities like XSS, SQLi, and directory exposure using tools like Nuclei.
Step‑by‑step guide explaining what this does and how to use it.
Nuclei uses YAML templates to send requests and match responses for known vulnerabilities.
Install Nuclei
go install -v github.com/projectdiscovery/nuclei/v3/cmd/nuclei@latest
Update the templates
nuclei -update-templates
Run Nuclei against your live hosts with severity filtering
nuclei -l live_hosts.txt -t cves/ -t exposures/ -t misconfiguration/ -severity critical,high -o nuclei_results.txt
Explanation: This command runs thousands of checks against your list. It focuses on Critical and High severity issues (like CVEs and major misconfigurations) to avoid alert fatigue. The output file lists the exact vulnerable endpoints and the payloads that triggered them.
4. Manual Exploitation: The Art of SQL Injection
Automated tools can find injection points, but manual exploitation often yields higher bounties. When a tool flags a potential SQLi, a hunter must confirm it.
Step‑by‑step guide explaining what this does and how to use it.
Use `sqlmap` to automate the exploitation process once a vulnerable parameter is identified.
Basic sqlmap scan on a specific URL with a parameter
sqlmap -u “https://target.com/page?id=1” –dbs –batch
If you need to use a cookie for authentication
sqlmap -u “https://target.com/page?id=1″ –cookie=”session=abc123” –tables -D database_name
For a more stealthy approach (avoiding heavy time-based payloads)
sqlmap -u “https://target.com/page?id=1” –technique=BEUST –random-agent –delay=2
Explanation: `–dbs` attempts to list all databases. `–tables -D` lists tables within a specific database. Using `–technique=BEUST` restricts the payload types to Boolean-based, Error-based, Union, Stacked, and Time-based, allowing for fine-tuned control. `–random-agent` and `–delay` help evade WAFs (Web Application Firewalls).
5. Reporting: Turning a Bug into a Bounty
The final step is crafting a report that is clear, concise, and provides reproducible steps. A good report is the difference between a “Duplicate” response and a “Critical” payout.
Step‑by‑step guide explaining what this does and how to use it.
A report should contain:
- Clear vulnerability type and location (e.g., “Reflected XSS on Login Page via ‘redirect’ Parameter”).
- Description: Explain the impact (e.g., Account takeover via session hijacking).
- Steps to Reproduce: A numbered, step-by-step guide.
- Proof of Concept (PoC): Include the exact request/response using a tool like Burp Suite.
- Impact: Explain the worst-case scenario.
- Remediation: Suggest a fix (e.g., “Implement output encoding”).
6. Staying Updated: The Continuous Learning Curve
Bug bounty is a moving target. Hunters must constantly learn new techniques and follow researchers. The comments in the original post show a community eager to learn (“info” bg, “Info targetnya mas”).
Step‑by‑step guide explaining what this does and how to use it.
Follow these resources:
- PortSwigger Research: For advanced web security techniques.
- GitHub Repos: Monitor repos like “Awesome-Bugbounty-Tools” and “PayloadsAllTheThings”.
- Twitter/X: Follow researchers like @TomNomNom, @Alra3ees, and project discovery.
What Undercode Say:
- Persistence Pays Off: The celebratory post isn’t just about luck; it’s the result of a rigorous methodology involving reconnaissance, scanning, and manual verification.
- Community and Collaboration: The comment section is a hive of activity where hunters ask for tips (“info bg”), highlighting that bug bounty is a team sport where knowledge sharing accelerates success.
Analysis: The post serves as a microcosm of the modern cybersecurity landscape. It demonstrates that significant security vulnerabilities are not just found by large, well-funded teams, but by independent researchers leveraging open-source tools. The excitement in the post and the engagement in the comments reflect a paradigm shift where organizations must rely on the global ethical hacker community to secure their assets. For aspiring professionals, this post is proof of concept: with the right methodology and relentless curiosity, “Alhamdulillah bug bounty kembali” can be a recurring reality.
Prediction:
As AI-powered tools like automated vulnerability scanners become more sophisticated, the barrier to entry for bug bounty hunting will lower. However, the value of human intuition and complex business logic flaws will skyrocket. We will see a divide where AI handles the “low-hanging fruit,” while elite hunters focus on chaining multiple simple bugs into a critical exploit chain, commanding even higher bounties.
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IT/Security Reporter URL:
Reported By: Fazriansyahmuh Bugbounty – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
