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ESET senior research fellow Nick FitzGerald said the Petya malware was designed to kill computers first , and ask for money second .
 ( ransom: ask for money,  kill computers: attack pattern, the Petya malware: tool) 
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: ask for money,  kill computers: attack pattern, the Petya malware: tool) 