Monday, December 12, 2011

Two Rules You Damned Well Better Know

Phishing is a wide spread Internet plague that is often used to fraudulently obtain usernames and passwords, bank account numbers and PINs, and other information used to steal money and information. Phishing generally refers specifically to email based attacks, but like most security terminology there are some that use the term more broadly.

The results of a successful phishing attack can result in a criminal emptying your back account, stealing your Facebook Account, raiding your PayPal account, or even hacking into your company’s network.

Most anti-phishing education to date has been focused around trying to teach people what a phishing attack looks like. I am all for education and if someone can teach you to be better at spotting a phishing attack it is a good thing, but the truth is these attacks can be so sophisticated that even security experts can be fooled or have a very hard time determining if a specific email is legitimate or not.

To try to help people defend against phishing attacks I use a method that I believe is far more effective. You see, the problem is not that you received and phishing email and did not realized you were under attack, the attack is only a problem if you engage in the behaviors that allow the attack to succeed. If you follow my two simple rules meticulously you will dramatically reduce the odds of a successful phishing attack against and it doesn’t matter if you know it is a phishing attack.  

Rule #1
There are only two types of people who ask you for your password… Thieves and idiots. You obviously do not want to give your password to a thief, and if you give it to an idiot, they’ll probably get tricked into giving it to a thief.

So when you get an email that says Hotmail, or PayPal, your bank, or someone else you do business with needs your password, it is a thief, not your bank, not PayPal, not EBay, not, Hotmail or Gmail, it is a thief. There isn’t a problem with your account. They are not updating their security systems, and it didn’t come from where you thought it did.

A common attack is for a person to call an employee and claim to be from helpdesk. The conversation progresses and they claim to need your password, or they need you to change your password to one they provide you. Changing your password to something someone else provides you is the same thing as telling someone else your password.

OK, there are exceptions to every rule, but if there is an exception to this rule, be very, very alert. For example, there may be a rare situation where IT at your workplace needs your password to help you resolve an issue. First off, in this case you initiated contact with IT, not the other way around. The second thing to know is that even if it is a rare, but legitimate need for your password, as soon as the problem is resolved you change your password. Not 30 minutes after the problem is resolved, not a day after, but immediately after the problem is resolved you change your password. Competent IT professionals do not want to know your password any longer than may rarely be required.

If it is your Internet Service Provider (ISP) asking for your password, you are dealing with an idiot. It may not actually be the technician on the other end of the phone, it may be a higher up who was ignorant enough to have a technician ask you for your password. Don’t give it to them, it probably is an attack.

To make it easy, pretend there can be absolutely no exceptions and whenever you see a request for your password in email, instant messaging/chat, or hear a request for your password on the phone, remember that you are dealing with a thief or an idiot and keep your password to yourself!

Rule #2
If you click on a link and it takes you to a login page, don’t do it. This is the most common type of phishing attack and is equally successful against high level executives as it is against a grandparent using a computer for the first time. The real travesty is that millions of times each day socially irresponsible sites like Facebook and LinkedIn teach people to become victims of phishing attacks.

Take a look at these two screen shots of emails I have actually received, and tell me if they are legitimate or phishing attacks?





You really can’t tell from looking and it really doesn’t matter because I am not clicking on the links in the emails. If these are legitimate then if I simply log into Facebook and LinkedIn, the notifications will be there. If these were well crafted phishing attacks, then when I clicked on them I would be presented with a very, very real looking login screen and a criminal would have my account credentials after I logged into the fake site.

It doesn’t matter if it is in email, chat, a Facebook comment or most anywhere else. If you click on a link that asks you to login, close your browser, open it back up, type in www.facebook.com or www.linkedin.com or whatever the real site is and log in there. Anything of importance will be there for you to find. The fake LinkedIn request has been quite successful against executives, where password requests to fix a problem with your Hotmail, Yahoo, or Gmail account work well with the general public.

You may think that there is nothing of value in your Facebook or email account, but you would be wrong. These accounts can be used to send spam and to trick your friends into believing a criminal is you so that your friends can be the victims of cybercrime.

Yeah, there’s more you need to know to be safe online, but follow these two simple rules religiously and you have drastically improved your security profile!

Randy Abrams
Independent Security Analyst and Educator for the Masses J

2 comments:

  1. agreed. BTW this phishing quiz is well done.
    http://www.opendns.com/phishing-quiz/
    Nick Bilogorskiy

    ReplyDelete
  2. Nice article, I love rule #1. I guess a password manager could also help, especially the lazy ones that prefer to click a link within an email.

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