The Conti cartel, which is thought to be run from Russia, has upped its ransom demand to $20m (£16m).
The president of Costa Rica says his country is "at war", as cyber-criminals cause major disruption to IT systems of numerous government ministries.
He gave no indication that he was planning on paying the ransom, in spite of growing disruption to government departments. "All applications received via email or in the windows of the National Accountancy will be attended to once systems are restored."Image source,Mr Chaves launches his Plan for Implementation of Cyber-security Measures in response to the hack
"The attack being experienced by Costa Rica at the hands of cyber-criminals, cyber-terrorists, is declared a national emergency," Mr Chavez said,"We are signing this decree, precisely, to declare a state of national emergency across the entire public sector of the Costa Rican state, and allow our society to respond to those attacks as criminal actions."
"There is less than a week left when we destroy your keys, we are also working on gaining access to your other systems, you have no other options but to pay us," it threatened. In the past, ransomware crews have attacked public bodies and local governments, but it is rare to see such a disruptive attack on a state.
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