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The ransomware then displays a message onscreen , ordinarily demanding money and providing a sole text input field in which a user must enter an unlock code provided by the malefactor , after the money is paid .
 ( ransom: demanding money,  The ransomware: tool, displays a message onscreen: 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: demanding money,  The ransomware: tool, displays a message onscreen: attack pattern) 