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“ While we can not surmise the attacker ’s [ Shadow Brokers ] identity or motivation nor where or how this pilfered trove came to be , we can state that several hundred tools from the leak share a strong connection with our previous findings from the Equation Group , ” Kaspersky Lab researchers , many of whom originally helped identify Equation Group ’s existence in 2015 , wrote in a company blog post in August .
 ( data breach: the leak,  the Equation Group: attacker, several hundred tools: compromised data) 
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: the leak,  the Equation Group: attacker, several hundred tools: compromised data) 