The unprecedented outbreak of Trojan ransomware WannaCry has created a worldwide plague affecting home users and businesses. We have already posted some basics about WannaCry, and in this post we will provide further advice particularly for businesses. It is urgent and critical to know what WannaCry is, how it spreads, what dangers it poses, and how to stop it.

What should I do right now?

One of the key reasons the Trojan erupted so quickly is that it transmits itself using an exploit, entering through a known Windows vulnerability with no user intervention (mistakes) needed. And once one computer is infected, the malware attempts to spread itself to all other systems in the local network.