Today security experts are warning of the continued spread of WCry and of numerous variants being released over the weekend.
Typical of Any Ransomware users should be vigilant with any emails that could be carrying a payload or be links to a payload. At this point Microsoft has not ruled out any attack vectors:
We haven’t found evidence of the exact initial entry vector used by this threat, but there are two scenarios we believe are highly possible for this ransomware family:
- Arrival through social engineering emails designed to trick users to run the malware and activate the worm-spreading functionality with the SMB exploit
- Infection through SMB exploit when an unpatched computer can be addressed in other infected machines
Microsoft has released a patch for Operating systems going as far back as XP:
Windows update MS17-010