513
The hacking tool spreads silently between computers , shutting them down by encrypting data and then demanding a ransom of US$ 300 to unlock them .
 The hacking tool: tool; computers: victim; shutting them down by encrypting data: attack pattern; US$ 300: 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 hacking tool: tool; computers: victim; shutting them down by encrypting data: attack pattern; US$ 300: price