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The criminals behind the ransomware are asking for 0.5 Bitcoin ( around $ 620 ) in order to decrypt the files .
 the ransomware: tool; The criminals: attacker; 0.5 Bitcoin: price; $ 620: 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 ransomware: tool; The criminals: attacker; 0.5 Bitcoin: price; $ 620: price