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However , the volume of ransomware attacks is still increasing and their speed , scale , sophistication and success in evading detection with the growth in file-less and memory - based malware , explains why ransomware will continue to be a major threat to CISOs in 2018 and beyond . ”
 ransom: ransomware attacks
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: ransomware attacks