1871
A bug in the way that Mobile Safari handles pop - up dialogs has been abused to scare iOS users into paying a “ fine ” in the form of an iTunes pre-paid card .
 ( ransom: paying a “ fine ”,  iOS users: victim, an iTunes pre-paid card: payment method, Mobile Safari handles pop - up dialogs has been abused: attack pattern) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( ransom: paying a “ fine ”,  iOS users: victim, an iTunes pre-paid card: payment method, Mobile Safari handles pop - up dialogs has been abused: attack pattern) 