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A new form of ransomware has emerged which is , unusually , being distributed by two separate exploit kits -- one of which was thought to have disappeared -- and demands payment in a lesser - known form of cryptocurrency .
 ransomware: tool; in a lesser - known form of cryptocurrency: payment method; exploit kits: 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:
 ransomware: tool; in a lesser - known form of cryptocurrency: payment method; exploit kits: tool