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Ransomware is a malicious software that prevents or limits users from accessing their system by locking them out until a ransom is paid .
 prevents or limits users from accessing their system: attack pattern; Ransomware: tool; locking them out: attack pattern
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:
 prevents or limits users from accessing their system: attack pattern; Ransomware: tool; locking them out: attack pattern