3537
That ’s when he said a hacker going by the handle “ Harak1r1 ” was compromising open MongoDB installations , deleting their contents , and leaving behind a ransom note demanding 0.2 BTC ( about $ 220 ) .
 ( ransom: a ransom note demanding,  $ 220: price, 0.2 BTC: price, Harak1r1: attacker, deleting their contents: attack pattern, compromising open MongoDB installations: attack pattern, a hacker: attacker) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( ransom: a ransom note demanding,  $ 220: price, 0.2 BTC: price, Harak1r1: attacker, deleting their contents: attack pattern, compromising open MongoDB installations: attack pattern, a hacker: attacker) 