Graham Cluley, a senior technology consultant at the British security firm Sophos, has written in a blog post, “you still haven't at this point been given a "Dislike" Facebook button, and the rogue application requires you to complete an online survey (which makes money for the scammers) before ultimately pointing you to a Firefox browser add-on for a Facebook dislike button developed by FaceMod”.
What it can do
On Facebook, avoid posts like: "I just got the Dislike button, so now I can dislike all of your dumb posts lol!!"
These posts are typically followed with a link that takes people to a fake Facebook application.
Instead of installing a dislike button, the application uses a person's social network to continue spreading the fake program. Typically, such schemes are designed to steal information from Internet users. That information then can be sold to other parties. The scams also can be used to co-opt an Internet user's social network contacts.
Cluley wrote, "If you do give the app permission to run, it silently updates your Facebook status to promote the link that tricked you in the first place, thus spreading the message virally to your Facebook friends and online contacts," he writes.
After the other viral scams like including 'Justin Bieber trying to flirt,' 'Student attacked his teacher and nearly killed him,' 'the biggest and scariest snake' and the 'world's worst McDonald's customer, the fake dislike button is the latest one to hit the Facebook users.
What you can do to uninstall
If you accidentally installed the fake application, click on the "account" button at the top right of the Facebook home screen. Navigate to the option that says "application settings," and disable the fake "dislike" application.
If the app has posted to your Facebook wall, go to your profile page and delete those posts to stop the scam from spreading further. Some experts also recommend checking your "interests" and "likes" settings from the "edit my profile" menu, to be sure that the app hasn't lodged itself there as well.
You can also ask Facebook to uninstall/remove it.
Facebook’s Response
As per Facebook, there is no official dislike button and have requested users to not click on strange links, even if they are from friends, and notify the person and report the link if one sees something suspicious. The company further added that it is trying to block the "dislike" app
