452
However , as the world returned to the office on Monday , those payments have been rapidly mounting , based on tracking data for the three Bitcoin wallets tied by researchers to the malware .
 ransom: payments
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: payments