Hospitals have been the high-profile target of several recent attacks by cybercriminals who take a computer's or network's files hostage and demand a payment to restore access. The weapon used is a type of malware (malicious software) that is aptly called ransomware. Hospitals are good targets from the criminals' perspective because not only are lives potentially on the line if a hospital network is compromised, making the situation more urgent, but also hospitals tend to spend less time maintaining their networks so they are easy prey. Ransomware attacks are not limited to large, public, or human services institutions. Individuals and small businesses are also likely victims, and attacks are on the rise. A report by Trend Micro shows more ransomware infections in February 2016 than in the first six months of 2015. Ransomware cost its victims some $24.1 million last year. In the face of this growing threat, the best strategy is a good defense.