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Major corporations across the world have been hit by a wave of ransomware attacks that encrypt computers and then demand that users pay $ 300 to a bitcoin address to restore access .
 $ 300: price; a bitcoin address: payment method
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:
 $ 300: price; a bitcoin address: payment method