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Last October , Ben Martin , a different researcher with the firm , discovered attackers scraping credit card numbers and exfiltrating them in obscure , sometimes publicly viewable image files .
 ( data breach: scraping,  credit card numbers: compromised data, attackers: attacker, Last October: time) 
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:
 ( data breach: scraping,  credit card numbers: compromised data, attackers: attacker, Last October: time) 