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The documents describe an internal CIA group called UMBRAGE that WikiLeaks said was stealing the techniques of other nation - state hackers to trick forensic investigators into falsely attributing CIA attacks to those actors .
 ( data breach: was stealing,  nation - state hackers: victim, UMBRAGE: attacker, an internal CIA group: attacker, the techniques: 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: was stealing,  nation - state hackers: victim, UMBRAGE: attacker, an internal CIA group: attacker, the techniques: compromised data) 