2780
Once it had infiltrated the device , the malicious software demanded a ransom of $ 500 dollars to unlock the screen , which simulated a warning from the Department of Justice .
 ( ransom: demanded a ransom,  it had infiltrated the device: attack pattern, the malicious software: tool, $ 500 dollars: price) 
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: demanded a ransom,  it had infiltrated the device: attack pattern, the malicious software: tool, $ 500 dollars: price) 