Below are the guidelines for protection against ransomware attack.
Ransomware using spam email and social engineering as primary attack vector, where end user is tricked into
downloading and executing a malicious file, But since it is executable worm which spread through links or url in email
and it gets downloaded when end user click on it.Wcry ransomeware uses payload which exploit a SMB vulnerability in
Windows operating system. Microsoft has released an security patch update for all its unsupported version of Windows
including Windows XP, Vista, Windows 8, Server 2003 and 2008 Editions. users and organizations are strongly advised to install
available Windows patches as soon as possible.
Below are the step how to protect yourself
1) Keep your system Up-to-date: if you are using supported, but older versions of Windows operating system, keep your system up to date, or simply upgrade your system to Windows 10.
2)Unsupported Windows OS: If you are using unsupported versions of Windows, including Windows XP, Vista, Server 2003 or 2008, apply the patch released by Microsoft.
http://www.catalog.update.microsoft.com/Search.aspx…
3) Enable Firewall: Enable firewall, and if it is already there, modify your firewall configurations to block access to SMB ports over the network or the Internet. The protocol operates on TCP ports 137, 139, and 445, and over UDP ports 137 and 138.
4) Disable SMB: Follow steps described by Microsoft to disable Server Message Block (SMB).
https://support.microsoft.com/…/how-to-enable-and-disable-s…
5 )Keep your Antivirus software up-to-date
6)Beware of Phishing: Always be suspicious of uninvited documents sent an email and never click on links inside those documents unless verifying the source.