A security analyst is determining a process for some important infrastructure elements to leverage when responding to a valid indicator of compromise. Which of the following would NOT be a normal step?

The process in question is focused on responding to a valid indicator of compromise (IOC), which typically involves immediate actions to mitigate or investigate a potential security threat. The normal steps in such a response often include analyzing and adjusting existing security mechanisms to ensure they effectively address the threat.

Implementing firewall rules, access control list (ACL) rules, and endpoint protection are all common and proactive measures taken during an incident response. Firewall rules might be modified to block suspicious traffic, ACL rules can be adjusted to restrict access to compromised resources, and endpoint protection software can be utilized to identify and remediate malware or unauthorized activities on devices.

In contrast, updating processes is not typically considered a direct response to an IOC. While updating and patching systems is essential for maintaining a secure environment, it is usually not a reactive step taken in the immediate aftermath of detecting an IOC. This action is more preventive and is part of ongoing maintenance and security hygiene rather than an immediate response tactic. Thus, updating processes would not align with the urgent response measures required in this scenario, making it the option that stands out as not a normal step.