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In Nayana 's first announcement a few days later , it said the hackers demanded 550 bitcoins to free up all the servers -- about $ 1.62 million .
 the hackers: attacker; 550 bitcoins: price; the servers: victim; $ 1.62 million: price
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: ransom 
  Option: victim, attacker, payment method, attack pattern, damage amount, tool, time, price, place 
Text: {0} 
Answer:
 the hackers: attacker; 550 bitcoins: price; the servers: victim; $ 1.62 million: price