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Once it has encrypted files on the phone , the malware hijacks the device , blocking the user 's access , and attempts to intimidate them into paying a ransom to unlock it .
 blocking the user 's access: attack pattern; the malware hijacks the device: attack pattern; encrypted files: attack pattern; the phone: 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:
 blocking the user 's access: attack pattern; the malware hijacks the device: attack pattern; encrypted files: attack pattern; the phone: victim