The National CERT of the Republic of Serbia (SRB-CERT) is informing and warning all computer and mobile device users on the fast propagation of the ransomware attack named ‘’WannaCry’’. This malicious software (malware) that disables computer access and use of data is a global threat and already made huge damage in many countries and their ICT systems. 
Since this malware attacks Microsoft Windows systems, the National CERT recommends all users to update their operating systems with MS17-010 version.
For more information please visit:  https://blogs.technet.microsoft.com/msrc/2017/05/12/customer-guidance-for-wannacrypt-attacks/?utm_source=t.co&utm_medium=referral