Here’s the second notice from US-CERT about an increasing number of ransomware infections. The malware has the ability to find and encrypt files located within shared network drives, USB drives, external hard drives, network file shares and even some cloud storage drives. If one computer on a network becomes infected, mapped network drives could also become infected. Victims are told they have three days to pay the attacker through a third-party payment method or they’ll lose their data.
The takeaway is, do not follow unsolicited web links in email messages.
Read all about it at http://www.us-cert.gov/ncas/alerts/TA13-309A