How hackers hack the credit cards using packet sniffing and session hijacking. In this tutorial we will discuss how we can exploit the vulnerability in credit or debit card functionality to hack the credit or debit cards password. Nowadays internet banking and credit cards are very common methods of funds transfer and online shopping. And the most interesting thing is that it is done over SSL. So people always have a misconception that their accounts cannot be hacked as their transactions are secured by extra security Layer i.e. SSL but its quite easy to break the SSL. So its always better to secure your computer and internet connection rather than depending on payment sites. So guys first of all we should know How the Credit cards work and transactions performed. After that we will see how credit cards can be hacked. Lets move on how it works.
First of all, let me tell you its virtually impossible to see the actual data that is transferring during a transaction but using session hijacking and packet sniffing we can achieve that but that also is in the encrypted format so if we are able to get that then we can move to further step to crack the encrypted data. So lets start the tutorial.
What attack really is?
The fatal flaw that enabled the sensitive information to be stolen is possible when an end-user is not properly educated on an easy to do and well-known SSL exploit – SSL MITM. The hackers take benefit of that to get access your sensitive data. As its a great saying PREVENTION IS BETTER THAN CURE. So an properly educated end user is really the requirement so that he can block all loopholes in the system. I have already shared two articles with you about how to secure yourself.
How credit cards can be hacked?
First thing i will tell you hacking credit or debit cards is illegal and it will result in serious consequences like 10 years imprisonment and much more. This tutorial is for educational purposes only. I am explaining this tutorial is just to make you aware that how it works.
The following diagram shows a very simplified graphic of how your SSL Banking session should work under normal conditions, then how it would work during an attack:
An important concept to grasp here is that a certificate is used to establish the secure SSL connection. This is a good thing, if you have a good certificate and are connecting directly to the website to which you intended to use. Then all your data is encrypted from your browser to the SSL website where the bank’s website will use the information from the certificate it gave you to decrypt your data/credentials. If that istruly the case, then it is pretty darn hard for a hacker to decrypt the data/credentials being transmitted, even if he is able to sniff your data.
This is a bad thing if you have a “Fake” certificate being sent from the hacker, and you are actually connecting to his machine, not directly to the bank’s website. In this case, your credentials are being transmitted between your browser and the hacker’s machine. The hacker is able to grab that traffic, and, because he gave you the certificate to encrypt the data/credentials, he can use that same certificate to decrypt your data/credentials.
EXACT STEPS TO HACK CREDIT CARDS OR DEBIT CARDS
The first thing he would do is turn on Fragrouter, so that his machine can perform IP forwarding
After that, he’ll want to direct your Wi-Fi network traffic to his machine instead of your data traffic going directly to the Internet. This enables him to be the “Man-in-the-Middle” between your machine and the Internet. Using Arpspoof, a real easy way to do this, he determines your IP address is 192.168.1.15 and the Default Gateway of the Wi-Fi network is 192.168.1.1:
The next step is to enable DNS Spoofing via DNSSpoof:
Since he will be replacing the Bank’s or Online Store’s valid certificate with his own fake one, he will need to turn on the utility to enable his system to be the Man-in-the-Middle for web sessions and to handle certificates. This is done via webmitm:
At this point, he is setup and ready to go, he now needs to begin actively sniffing your data passing through his machine including your login information and credit card info. He opts to do this with Ethereal, then saves his capture:
He now has the data, but it is still encrypted with 128-bit SSL. No problem, since he has the key. What he simply needs to do now is decrypt the data using the certificate that he gave you. He does this with SSL Dump:
The data is now decrypted and he runs a Cat command to view the now decrypted SSL information. Note that the username is “Bankusername” and the password is “BankPassword”. Conveniently, this dump also shows that the Banking site as National City. FYI, the better, more secure banking and online store websites will have you first connect to another, preceeding page via SSL, prior to connecting to the page where you enter the sensitive information such as bank login credentials or credit card numbers. The reason for this is to stop the MITM-type attack. How this helps is that if you were to access this preceeding page first with a “fake” certificate and then proceeded to the next page where you were to enter the sensitve information, that page where you would enter the sensitive information would not display. That is because the page gathering the sensitive information would be expecting a valid certificate, which it would not receive because of the Man-in-the-Middle. While some online banks and stores do implement this extra step/page for security reasons, the real flaw in this attack is the uneducated end-user, as you’ll soon see:
With this information, he can now log into your Online Banking Account with the same access and privileges as you. He could transfer money, view account data, etc.
Below is an example of a sniffed SSL credit card purchase/transaction. You can see that Elvis Presley was attempting to make a purchase with his credit card 5440123412341234 with an expiration date of 5/06 and the billing address of Graceland in Memphis, TN (He is alive!). If this was your information, the hacker could easily make online purchases with your card.
Also Real Bad News for SSL VPN Admins
This type of attack could be particularly bad for corporations. The reason for this is that Corporate SSL VPN solutions are also vulnerable to this type of attack. Corporate SSL VPN solutions will often authenticate against Active Directory, the NT Domain, LDAP or some other centralized credentials data store. Sniffing the SSL VPN login then gives an attacker valid credentials to the corporate network and other systems.
What an End-User Needs To Know
There’s a big step and end-user can take to prevent this from taking place. When the MITM Hacker uses the “bad” certificate instead of the “good”, valid certificate, the end-user is actually alerted to this. The problem is that most end-users don’t understand what this means and will unknowingly agree to use the fake certificate. Below is an example of the Security Alert an end-user would receive. Most uneducated end-users would simply click “Yes”… and this is the fatal flaw:
By clicking “Yes”, they have set themselves up to be hacked. By clicking the “View Certificate” button, the end-user would easily see that there is a problem. Below are examples of the various certificate views/tabs that show a good certificate compared to the bad certificate:
|How an End-User Can Prevent This|
- Again, the simple act of viewing the certificate and clicking “No” would have prevented this from happening.
- Education is the key for an end-user. If you see this message, take the time to view the certificate. As you can see from the examples above, you can tell when something doesn’t look right. If you can’t tell, err on the side of caution and call your Online Bank or the Online store.
- Take the time to read and understand all security messages you receive. Don’t just randomly click yes out of convenience.
How a Corporation Can Prevent Attack
- Educate the end-user on the Security Alert and how to react to it.
- Utilize One Time Passwords, such as RSA Tokens, to prevent the reuse of sniffed credentials.
- When using SSL VPN, utilize mature products with advanced features, such as Juniper’s Secure Application Manager or Network Connect functionality.
Hope it will make you clear how it works and how credit cards can be hacked online.