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BitPaymer is a complex cocktail of malware that enters a targeted system through a Trojan horse , then lies dormant until it ’s noticed and authorized users attempt to remove it , at which point it locks up the system with a demand for a sum of money payable in bitcoin .
 locks up the system: attack pattern; payable in bitcoin: payment method; BitPaymer: 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:
 locks up the system: attack pattern; payable in bitcoin: payment method; BitPaymer: tool