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Introduction:
Bug bounty hunting is the art of questioning digital trust—probing applications, APIs, and cloud infrastructures that “should be safe” to uncover hidden vulnerabilities before malicious actors do. As demonstrated by a security specialist earning $3,000 in March and $1,000 in April through the Intigriti platform, methodical curiosity directly translates into financial reward. This article extracts actionable technical content from that real-world success, delivering a structured guide to reconnaissance, exploitation, mitigation, and professional reporting.
Learning Objectives:
- Master reconnaissance automation and subdomain enumeration using Linux and Windows tools
- Execute manual and automated exploitation of common web vulnerabilities (SQLi, XSS, IDOR)
- Apply API security testing techniques and cloud hardening measures for bug bounty or defensive use
You Should Know:
- Building a Bug Bounty Lab for Safe Testing
Before hunting live targets, isolate your environment to avoid legal issues and accurately reproduce findings. Use virtual machines (VirtualBox/VMware) or Docker containers.
Step‑by‑step Linux lab setup (Ubuntu/Debian):
Update system and install core tools sudo apt update && sudo apt upgrade -y sudo apt install -y docker.io docker-compose git curl wget nmap jq Run a vulnerable web app for practice (e.g., DVWA) sudo docker run --rm -p 80:80 vulnerables/web-dvwa Install Burp Suite Community Edition wget https://portswigger.net/burp/releases/download?product=community&version=2024.9.1&type=Linux -O burp_installer.sh chmod +x burp_installer.sh ./burp_installer.sh
Windows PowerShell setup (admin):
Install Chocolatey package manager
Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))
Install tools
choco install burp-suite-community nmap postman docker-desktop -y
Configure Burp Suite as a proxy (127.0.0.1:8080) with FoxyProxy browser extension. Always test only on authorized targets (e.g., Intigriti’s private programs) to remain compliant.
2. Automated Reconnaissance: Find Hidden Attack Surface
Bug bounties often reward obscure endpoints. Perform subdomain enumeration and service discovery using the following workflow.
Linux reconnaissance commands:
Subdomain enumeration with assetfinder and subfinder echo "target.com" | assetfinder -subs-only | tee subs.txt subfinder -d target.com -o subfinder_subs.txt Probe live hosts with httpx cat subs.txt | httpx -status-code -title -tech-detect -o live_hosts.txt Port scan top 1000 TCP ports on discovered IPs nmap -iL live_ips.txt -p- --min-rate 1000 -oN full_scan.txt
Windows reconnaissance (PowerShell):
Resolve subdomains using Resolve-DnsName
Get-Content .\subdomains.txt | ForEach-Object { Resolve-DnsName $_ -ErrorAction SilentlyContinue | Where-Object {$_.Type -eq "A"} | Select-Object Name, IPAddress }
Basic port scan using Test-NetConnection (slow for many ports)
1..1024 | ForEach-Object { Test-NetConnection target.com -Port $_ -InformationLevel Quiet | Where-Object {$_ -eq $true} }
For efficiency, use `nmap` on Windows via WSL or the standalone binary. Combine outputs into a unified asset inventory before proceeding to vulnerability discovery.
- Web Vulnerability Exploitation: SQLi and XSS in Practice
Two classic bug classes remain highly rewarding. Below are safe, authorized testing commands—always use these only on targets with explicit permission.
Manual SQLi detection with `sqlmap` (Linux):
Basic boolean-based blind test sqlmap -u "https://target.com/product?id=5" --batch --level=2 --risk=2 --dbs Extract table names from a discovered database sqlmap -u "https://target.com/product?id=5" -D database_name --tables --batch
Command to test for reflected XSS:
Using curl with payload curl "https://target.com/search?q=<script>alert(1)</script>" -H "User-Agent: Mozilla/5.0" -I | grep -i "x-xss-protection"
Windows alternative with PowerShell:
$payload = "<script>alert('XSS')</script>"
$url = "https://target.com/search?q=$payload"
Invoke-WebRequest -Uri $url -UseBasicParsing | Select-Object -ExpandProperty Content | Select-String "alert"
If the payload executes in the browser, report it immediately. Use XSS Hunter (xsshunter.com) to capture blind XSS callbacks.
4. API Security Testing: From Recon to Exploitation
APIs power modern applications and frequently host IDOR (Insecure Direct Object References) and mass assignment bugs. Use Postman or custom scripts.
Postman workflow for IDOR:
- Capture authenticated API requests (e.g.,
GET /api/user/1234/profile). - Change the numeric ID to another user’s ID (e.g.,
1235) and re-send. - If you receive another user’s data, you’ve found an IDOR.
Automated API fuzzing with `ffuf` (Linux):
Fuzz user IDs from 1000 to 2000 ffuf -u https://target.com/api/user/FUZZ/profile -w ids.txt -fc 403,404 Test for mass assignment by adding unexpected parameters ffuf -X POST -u https://target.com/api/update-profile -d "name=test&role=admin" -H "Content-Type: application/x-www-form-urlencoded" -w /usr/share/wordlists/param.txt -fc 400
Cloud hardening for API keys: Never hardcode secrets. Use environment variables or vaults (HashiCorp Vault, AWS Secrets Manager). For bug hunters, look for exposed .git/config, .env, or `serverless.yml` files containing credentials.
5. Mitigation and Patch Verification
After discovering a bug, help the organization fix it and verify the patch. Below are commands to test if a SQLi or XSS fix holds.
Linux commands to validate a WAF/parameterized query fix:
Attempt previous SQLi payload – expect 400/403 or sanitized output curl -G "https://target.com/product" --data-urlencode "id=5' OR '1'='1" -s | grep -i "error|mysql"
Check for reflected XSS after patch:
Use a benign payload; assess if encoded curl "https://target.com/search?q=<script>console.log(1)</script>" -s | grep -o "<script>"
Windows PowerShell check:
$testUrl = "https://target.com/product?id=5' OR '1'='1"
$response = Invoke-WebRequest -Uri $testUrl -UseBasicParsing
if ($response.Content -match "SQL syntax|mysql_fetch") { Write-Host "Vulnerability persists" }
Include these validation steps in your bug report to prove the issue is truly fixed and claim your bounty faster.
6. Reporting and Submitting Bugs via Intigriti
Intigriti expects structured reports. Follow this template:
Report
– Endpoint – Impact</h2>
Steps to Reproduce: Provide URLs, payloads, and HTTP requests (use `curl -v` output).
Proof of Concept (PoC): Screenshot or video, plus a one‑liner script.
Impact: What an attacker can do (e.g., extract all user emails).
<h2 style="color: yellow;">Suggested Fix: Parameterized queries, output encoding, access controls.</h2>
<h2 style="color: yellow;">Example `curl` output to include:</h2>
[bash]
curl -X GET "https://target.com/api/user/1337" -H "Authorization: Bearer $TOKEN" -v
After submitting, use Intigriti’s collaboration tools to chat with the security team. Respect disclosure policies; never reveal a bug publicly before it’s patched.
What Undercode Say:
- Curiosity is a technical skill – The $4,000 earnings highlight that questioning “secure” assumptions yields real vulnerabilities; bug bounty success depends on a skeptical mindset paired with automated tooling.
- Command‑line proficiency separates hunters from hobbyists – Using
nmap,ffuf,sqlmap, and `curl` on Linux/WSL, alongside PowerShell for Windows environments, dramatically increases coverage and discovery speed. - Bug bounty is repeatable through methodology – From recon to reporting, a structured workflow (subdomain enum → live probing → parameter fuzzing → exploitation) consistently finds bugs, as shown by monthly payouts.
Prediction:
The bug bounty market will exceed $15 billion by 2030, driven by AI‑assisted reconnaissance tools (e.g., automated graph‑based API testing) and expanded cloud attack surfaces. However, platforms like Intigriti will demand higher‑quality reports with proof‑of‑concept code and atomic mitigation steps, pushing hunters to integrate CI/CD pipeline scanning into their workflows. The line between red teaming and bug hunting will blur, requiring professionals to master infrastructure-as-code hardening alongside traditional web pentesting. Those who combine Linux command mastery with cloud–native security (AWS IAM misconfigurations, Kubernetes RBAC) will command bounties exceeding $10,000 per critical finding.
▶️ Related Video (72% Match):
🎯Let’s Practice For Free:
IT/Security Reporter URL:
Reported By: Jan M – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
