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Ransomware typically infects computers when its user opens a file attached to spam mail from a sender pretending to be a legitimate entity such as a parcel delivery company , according to the government - affiliated Information - Technology Promotion Agency .
 ( phishing: pretending to be,  a legitimate entity: trusted entity, a sender: attacker, opens a file attached to spam mail: attack pattern, Ransomware typically infects computers: purpose, its user: victim, a parcel delivery company: attacker) 
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: pretending to be,  a legitimate entity: trusted entity, a sender: attacker, opens a file attached to spam mail: attack pattern, Ransomware typically infects computers: purpose, its user: victim, a parcel delivery company: attacker) 