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Poweliks crept into the Windows registry to force the computer to do all sorts of nasty things , from demanding a ransom to joining a click - fraud bot network to click ads without the user even realizing it .
 ransom: demanding a ransom
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: demanding a ransom