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That ’s when misconfigured and insecure MongoDB , Hadoop and CouchDB installations became popular extortion targets for hackers who were scanning for vulnerable servers to attack .
 MongoDB: victim; Hadoop: victim; CouchDB: victim; hackers: attacker; scanning for vulnerable servers to attack: attack pattern
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: ransom 
  Option: victim, attacker, payment method, attack pattern, damage amount, tool, time, price, place 
Text: {0} 
Answer:
 MongoDB: victim; Hadoop: victim; CouchDB: victim; hackers: attacker; scanning for vulnerable servers to attack: attack pattern