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Cyberthieves are increasingly targeting the malicious software , which locks all files on a targeted computer or network until the owner pays up , at smaller and arguably more vulnerable organizations .
 locks all files on a targeted computer or network: attack pattern; Cyberthieves: attacker; the malicious software: victim; the owner: victim
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 all files on a targeted computer or network: attack pattern; Cyberthieves: attacker; the malicious software: victim; the owner: victim