24. A security analyst learns that an attack vector, which was used as a part of a recent incident, was a well-known IoT device exploit. The analyst needs to review logs to identify the time of initial exploit. Which of the following logs should the analyst review first?
Answer: C
The analyst should review the firewall logs first.
Firewall logs are crucial for identifying unauthorized access attempts and tracking the flow of traffic in and out of the network. Since the attack vector involved an IoT device exploit, the firewall logs will provide insights into any suspicious activities related to that device.
A) Wireless access point
While wireless access point logs can provide information regarding connected devices and their activities, they are not as comprehensive as firewall logs when it comes to tracking potential attacks. These logs may indicate when a device connected to the network, but they typically lack detailed information about the traffic patterns and any malicious attempts.
B) Switch
Switch logs primarily record the data traffic between devices on the local network. While they can help identify which devices were communicating, they do not provide insights into external attacks or unauthorized access attempts, making them less relevant for determining the time of the initial exploit.
C) Firewall
Firewall logs are essential for understanding the security posture of a network. They record all incoming and outgoing traffic, making them the first place an analyst should look to identify the initial exploit and any malicious activity related to the IoT device. This makes reviewing firewall logs the most effective choice.
D) NAC
Network Access Control (NAC) logs focus on the devices that are allowed or denied access to the network. While they provide useful information about device authentication and compliance, they do not specifically track exploit attempts or the timing of such events, rendering them less useful for the analyst's immediate need to identify the exploit's timing.
Conclusion
Reviewing the firewall logs is the most effective method for the analyst to identify the time of the initial exploit, as these logs provide detailed information on traffic patterns and security incidents. In contrast, the other options—wireless access point, switch, and NAC logs—offer limited insights into the exploit's timing and effectiveness in tracking unauthorized access attempts.