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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 .
 ransom: demands
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 ransom: demands