Which of the following is categorized as a cyber event of Cat 8?

The correct choice pertains to a cyber event categorized as Category 8, which is typically associated with activities that involve investigation rather than immediate incidents or attacks. This category often includes events that may not have resulted in an immediate adverse effect or breach but require examination or scrutiny to prevent potential risks or more severe issues in the future.

In this context, "Investigating" fits the description well as it involves actions taken to understand or analyze an event that could pose a security risk. This proactive approach is crucial in network security, allowing organizations to mitigate threats before they escalate into significant incidents.

The other options, while relevant to cybersecurity, typically fall into categories that signify direct consequences of malicious activities or breaches rather than being classified strictly as investigations or assessments of potential threats. Understanding these distinctions is essential for effective incident response and management in cybersecurity practices.