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Email spam campaigns usually rely heavily on malware - infected computers known as bots ( short for “ robots ” ) or zombies that can be remotely commanded to start sending unwanted messages secretly in the background .
 ( phishing: Email spam campaigns,  malware - infected computers: purpose, bots: tool, zombies: 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:
 ( phishing: Email spam campaigns,  malware - infected computers: purpose, bots: tool, zombies: tool) 