In the scenario where a government agency's confidential information is leaked, the most likely threat actor group involved would be state-sponsored hackers:
* Motivation:
* National Interests: State-sponsored hackers are typically employed by governments to pursue national interests, which often include espionage, stealing sensitive information, and undermining the operations of other states.
* Capabilities:
* Advanced Techniques: These groups possess advanced capabilities and resources, making them highly effective in penetrating secure systems and exfiltrating valuable data.
* Examples:
* Historical Incidents: Numerous incidents, such as the attacks attributed to APT groups like APT28 (Fancy Bear) and APT29 (Cozy Bear), have been linked to state-sponsored actors targeting government and military organizations.
References:
* FireEye APT Groups: FireEye Threat Intelligence
* Mandiant M-Trends Report: Mandiant