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Disney boss Bob Iger has said the mass media giant is being targeted by hackers who are trying to extort money from the firm by threatening to release a film they claim to have stolen .
 ( ransom: extort money,  the mass media giant: victim, hackers: attacker, the firm: victim, threatening to release a film: 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: extort money,  the mass media giant: victim, hackers: attacker, the firm: victim, threatening to release a film: attack pattern) 