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If the ransomware infects a system , it demands 0.25 bitcoins - currently worth about $ 300 - for a decryption key .
 the ransomware infects a system: attack pattern; 0.25 bitcoins: price; $ 300: price; it: tool
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 infects a system: attack pattern; 0.25 bitcoins: price; $ 300: price; it: tool