1873
Ransomware scammers have been exploiting a flaw in Apple 's Mobile Safari browser in a campaign to extort fees from uninformed users .
 uninformed users: victim; Ransomware scammers: attacker; have been exploiting a flaw in Apple 's Mobile Safari browser: 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:
 uninformed users: victim; Ransomware scammers: attacker; have been exploiting a flaw in Apple 's Mobile Safari browser: attack pattern