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Hackers appear to have accessed an exposed CloudPets ' database , which contained email addresses and hashed passwords , and they even sought to ransom the information back in January , he said in a blog post .
 ( data breach: have accessed,  Hackers: attacker, database: compromised data, email addresses: compromised data, hashed passwords: compromised data, CloudPets: 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:
 ( data breach: have accessed,  Hackers: attacker, database: compromised data, email addresses: compromised data, hashed passwords: compromised data, CloudPets: victim) 