A security is responding to an incident on a web server on the company network that is making a large number of outbound

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A security is responding to an incident on a web server on the company network that is making a large number of outbound requests over DNS. Which of the following is the FIRST step the analyst should take to evaluate this potential indicator of compromise?

A. Run an anti-malware scan on the system to detect and eradicate the current threat
B. Start a network capture on the system to look into the DNS requests to validate command and control traffic Most Voted
C. Shut down the system to prevent further degradation of the company network
D. Reimage the machine to remove the threat completely and get back to a normal running state
E. Isolate the system on the network to ensure it cannot access other systems while evaluation is underway