CryptoWall ransomeware paralyses Greek networks
CryptoWall is a ransomeware virus that essentially freezes and encrypts the target's computer until a ransom is paid in Bitcoins.  Greek authorities say that over the past week the virus seems to have spread aggressively across many networks and shows few signs of slowing down. The FBI recently labelled CryptoWall "the most current and significant ransomeware threat targeting U.S. individuals and businesses."

A computer virus demanding bitcoins as ransom for encrypted files is spreading through Greece, the country's police cybersecurity unit said on Wednesday.

The virus has infected both personal computers and corporate networks, according to Greek police. The virus, identified as CryptoWall, appears to be a successor of CryptoLocker, a computer virus active between 2013 and 2014, which is estimated to have extorted at least $3 million in bitcoin ransoms.

"In the past several days, the situation has intensified, there are thousands of messages about the infection of corporate networks," the Greek police statement said.