CryptoLocker
This malware encrypts your data and displays a message which states that your private information can be decrypted for a sum of money in a limited period of time. Though CryptoLocker can be removed by various security solutions, there isn’t any way yet to decrypt the locked files.

CryptoLocker is one of the nastiest pieces of malware ever created. It’s not just because it takes money from you or because it can access your private data, but once it manages to encrypt your information, there is no way for you to decrypt those files. This ransomware is so dangerous because the affected users have their private information disclosed (and taken advantage from) and they also lose the files without having any chance of recovering them.

CryptoLocker is a ransomware Trojan which can infect your system in different ways, but usually, this happens through the means of an apparently legitimate e-mail attachment, from a well-known company or institution. Because it spreads through e-mail attachments, this ransomware is known to target companies and institutions through phishing attacks.