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Hummingbad is an Android malware that establishes a persistent rootkit on the device , installs fraudulent applications , and with slight modifications , could enable additional malicious activity such as installing a key - logger , stealing credentials and bypassing encrypted email containers used by enterprises .
 ( data breach: stealing,  credentials: compromised data, Android malware: tool, Hummingbad: tool, installing a key - logger: attack pattern) 
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: stealing,  credentials: compromised data, Android malware: tool, Hummingbad: tool, installing a key - logger: attack pattern) 