Malware is virtually everywhere. Sorry for the nerdy pun (not really). The problem is, malware protection isn't enough. These dirtbags are inventing new threats so fast, it's impossible for software to keep up. What typically makes the difference is making sure that you approach every email (and their attachments) with caution. Pay special attention to the Solution section of the page linked below. The first bullet is always good advice: "Do not follow unsolicited web links in email messages or submit any information to webpages in links"
According to the US-CERT website: CryptoLocker appears to have been spreading through fake emails designed to mimic the look of legitimate businesses and through phony FedEx and UPS tracking notices. In addition, there have been reports that some victims saw the malware appear following after a previous infection from one of several botnets frequently leveraged in the cyber-criminal underground.
For more information regarding computer security, visit US-cert.gov. To read the complete alert on CryptoLocker Ransomware Infections, go to https://www.us-cert.gov/ncas/alerts/TA13-309A.
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