Security administrator for your organization utilized a heuristic system to detect an anomaly in a desktop computer's baseline. The admin was able to detect an attack even though the signature-based IDS and antivirus software did not detect it. Upon further review, it appears that the attacker had downloaded an executable file on the desktop computer from a USB port, and executed it triggering a privilege escalation. What type of attack has occurred?

Zero day

Explanation:

Zero day attack is the term used to describe the threat of an unknown security vulnerability in a computer software or application for which either the patch has not been released or the application developers were unaware of or did not have sufficient time to address.

Since the vulnerability is not known in advance, the exploits often occur without the knowledge of the users. A zero day flaw is considered as an important component when designing an application to be efficient and secure.

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