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The ransomware attacked more than 153 Linux servers that South Korean web provider Nayana hosted , locking up more than 3,400 websites on June 10 .
 ( ransom: attacked,  The ransomware: tool, Linux servers: victim, locking up more than 3,400 websites: attack pattern, June 10: time, Nayana: victim) 
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: attacked,  The ransomware: tool, Linux servers: victim, locking up more than 3,400 websites: attack pattern, June 10: time, Nayana: victim) 