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In many cases , the payment demanded is only in the tens of thousands of dollars , and occasionally ransomware can be spammed without a specific target , but the affected computer systems are encrypted and inaccessible until the hackers release a key .
 ( ransom: the payment demanded,  the affected computer systems are encrypted: attack pattern, the hackers: attacker, the tens of thousands of dollars: price) 
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 payment demanded,  the affected computer systems are encrypted: attack pattern, the hackers: attacker, the tens of thousands of dollars: price) 