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While the ransomware attack is making use of the SMB vulnerability to spread , the encryption of files is done by the Wan na Decryptor attack that seeks out all files on a victim 's network .
 ( ransom: the ransomware attack,  use of the SMB vulnerability to spread: attack pattern, the encryption of files: attack pattern) 
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: the ransomware attack,  use of the SMB vulnerability to spread: attack pattern, the encryption of files: attack pattern) 