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However , the fraudsters behind this latest scam are looking to take advantage of the fact WhatsApp -- which has over a billion users -- did once rely on a subscription service to dupe victims into handing over their banking information .
 victims: victim; handing over their banking information: purpose; fraudsters: attacker
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: phishing 
  Option: victim, attacker, attack pattern, purpose, damage amount, tool, time, place, trusted entity 
Text: {0} 
Answer:
 victims: victim; handing over their banking information: purpose; fraudsters: attacker