Facebook users are facing a new threat, 419 scams in chat form, masquerading as friends. An acquaintance sent me a message using Facebook chat that said, Hi . Easy enough. I replied in kind. Then she told me a horror story of being held at gunpoint and stranded in London. Researchers identify malware existing in popular add-ons for Facebook, Vimeo, Instagram and others that are commonly used in browsers from Google and Microsoft.
Source: https://threatpost.com/facebook-scam-im-stranded-london-send-money-062209/72852/