Locky needed only two weeks to become the second most popular ransomware, accounting for 16.47 percent of all ransomware attacks. A massive spam campaign with 4 million messages was noticed in early March. The initial malware changed from an Office macro to a JavaScript attachment in an attempt to evade detection. The changes in communication and methods of encoding the downloader are being done to avoid signature-based detection methods. There have been attempts to create a malware vaccine, but not opening unknown links in messages may be the most effective prevention available.”]