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“ These spear - phishing emails were crafted to appear highly convincing , including being sent from legitimate email accounts suspected to have been previously compromised by the Callisto Group via credential phishing , ” F - Secure noted in a paper , adding that the group is continuing to set up new phishing infrastructure every week .
 ( phishing: were crafted,  spear - phishing emails: tool) 
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:
 ( phishing: were crafted,  spear - phishing emails: tool) 