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To pay the ransom , victims have to enter their credit card number directly in the ransom screen , a technique very different from how other ransomware operators like to work , which is via Bitcoin , Tor , or gift cards .
 victims: victim; credit card: payment method; Bitcoin: payment method; gift cards: payment method; Tor: 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:
 victims: victim; credit card: payment method; Bitcoin: payment method; gift cards: payment method; Tor: payment method