Be wary of prompts on Facebook to download an application with the message “Download the official DISLIKE button now” as it is a scam.

This scam tricks users into allowing a rogue application to access their profile page, which then posts spam messages. So 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.

According to Graham Cluley of security firm Sophos, agreeing to install the application also requires you to fill out a survey that makes money for online scammers before ultimately pointing to an add-on for web browser Firefox developed by a legitimate company called FaceMod. “As far as we can tell, FaceMod aren’t connected with the scam — their browser add-on is simply being used as bait” said Cluley.

To keep an eye out for other looming Facebook security threats, check out the Sophos Facebook page.

Sources: bbc.co.uk; sophos.com