A new Facebook phishing scam has been detected that attempts to fools end users into believing they are on the genuine Facebook site using a technique called URL padding. The attack method is being used in targeted attacks on users of the mobile Facebook website.
As with other Facebook phishing scams, the aim of the attackers is to get end users to reveal their Facebook login credentials. The scam takes advantage of poor security awareness and a lack of attentiveness.
URL padding – as the name suggests – involves padding the URL with hyphens to mask the real website that is being visited. The URLs being used by the attackers start with m.facebook.com, which is the correct domain for the genuine Facebook website. In a small URL bar on mobile phones, this part of the URL will be clearly visible.
What follows that apparent domain is a series of hyphens: m.facebook.com————-. That takes the latter part of the domain outside the viewable area of the address bar. End users may therefore be fooled into thinking they are on the genuine website as they will not see the last part of the URL. If they were to check, they would see that m.facebook.com————- is actually a subdomain of the site they are visiting.
The hyphens would be a giveaway that the site is not genuine, but the attackers add in an additional word into the URL such as ‘validate’ or ‘secure’ or ‘login’ to add authenticity.
The attackers have lifted the login box and branding from Facebook, so the login page that is presented appears to be the same as is used on the genuine site.
One telltale sign that all is not as it appears is the use of hxxp:// instead of https:// at the start of the URL, a sure sign that the site is not genuine. Even so, many Facebook users would be fooled by such a scam. URL padding is also being used to target users of other online services such as Apple iCloud and Comcast.
Facebook accounts contain a wealth of information that can be used in future spear phishing campaigns or attacks on the victims’ contacts. PhishLabs, which discovered the new scam, says the attackers are currently using this phishing scam for the latter and are using the account access to spam end users’ contacts and conduct further phishing campaigns.
While the scam has been detected, it is currently unclear how links to the phishing website are being distributed. While it is possible that they are arriving via spam email, Phishlabs suggests SMS messages or messenger services are being used.