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Infamous Necurs botnet seen sending spam emails containing new ransomware to millions of potential victims in just a few hours .
 ( phishing: sending,  Necurs botnet: attack pattern, spam emails containing new ransomware: attack pattern, victims: victim, a few hours: time) 
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:
 ( phishing: sending,  Necurs botnet: attack pattern, spam emails containing new ransomware: attack pattern, victims: victim, a few hours: time) 