2599
Finally , ransomware gangs ' use of customer service portals - to help and encourage victims to pay their ransoms - continues , says Mikko Hypponen , chief research officer of Finnish security firm F - Secure .
 ransomware gangs: attacker; victims: 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:
 ransomware gangs: attacker; victims: victim