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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 .
 malware - infected computers: purpose; bots: tool; zombies: tool
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: phishing 
  Option: victim, attacker, attack pattern, purpose, damage amount, tool, time, place, trusted entity 
Text: {0} 
Answer:
 malware - infected computers: purpose; bots: tool; zombies: tool