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As with other ransomware attacks , the infected victim sees their desktop changed to a ransom note and they 're directed to instructions , telling them their files are encrypted and that they must visit a dark web address in order to pay to get their files back .
 victim: victim; telling them their files are encrypted: attack pattern; a ransom note: 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:
 victim: victim; telling them their files are encrypted: attack pattern; a ransom note: tool