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The majority of ransomware attacks come with a set of identifying characteristics , such as the use of malicious coding that can spread throughout the network , the blocking of access to important data in the victim ’s servers in a variety of creative ways , including the scrambling of file names and adding different extensions to prevent them from being accessed .
 ( ransom: ransomware attacks,  the use of malicious coding that can spread throughout the network: attack pattern, the blocking of access to important data: attack pattern, servers: victim, victim: victim, prevent them from being accessed: 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: ransomware attacks,  the use of malicious coding that can spread throughout the network: attack pattern, the blocking of access to important data: attack pattern, servers: victim, victim: victim, prevent them from being accessed: attack pattern) 