3266
Unlike the Hadoop vandalism , the CouchDB attacks are accompanied by ransom messages , with attackers asking for 0.1 bitcoins ( around $ 100 ) to return the data .
 ( ransom: attacks,  are accompanied by ransom messages: attack pattern, CouchDB: 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: attacks,  are accompanied by ransom messages: attack pattern, CouchDB: victim) 