1422
The hacker then demands the target pay a ransom to get their files unencrypted , and in just about every ransomware attack , the hackers cover their tracks by demanding payment in bitcoin – a virtual currency that is hard , if not impossible to trace .
 The hacker: 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: ransom 
  Option: victim, attacker, payment method, attack pattern, damage amount, tool, time, price, place 
Text: {0} 
Answer:
 The hacker: attacker