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As a new cyberattack continues to sweep across the globe , the company is once again at the center of the debate over who is to blame for a vicious strain of malware demanding ransom from victims in exchange for the unlocking of their digital files .
 victims: victim; malware: 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:
 victims: victim; malware: tool