The security firm ESET has warned on an increase of infected e-mails containing a malicious zipped attachment called Nemucod. It downloads ransomware, for example, TeslaCrypt or Locky. When opened, it encrypts the data on the victim’s computer and demand ransom for decryption. The virus has been detected in Europe, North America, Australia, Japan, and Africa . According to an Intel security report, global ransomware cases increased almost 170% in 2015. Bitdefender, an internet security company, found that almost half of the victims surveyed across Europe and the US have paid extortionists to recover data .