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Cybersecurity experts say the hackers behind the " WannaCry " ransomware , who demanded $ 300 payments to decrypt files locked by the malware , used a vulnerability that came from U.S. government documents leaked online .
 $ 300: price; the " WannaCry " ransomware: tool; the hackers: attacker
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; the " WannaCry " ransomware: tool; the hackers: attacker