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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 .
 are accompanied by ransom messages: attack pattern; CouchDB: victim
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:
 are accompanied by ransom messages: attack pattern; CouchDB: victim