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Cyber security experts reveal they have found a second massive computer virus which has affected hundreds of thousands of computers world - wide , like the WannaCry cyber attack last week , has affected hundreds of thousands of computers world - wide and may have North Korean origins .
 ( ransom: WannaCry cyber attack,  last week: time, computers: victim) 
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: WannaCry cyber attack,  last week: time, computers: victim) 