Preparation is the phase in the incident response process when a security analyst reviews roles and responsibilities, as well as the policies and procedures for handling incidents. Preparation also involves gathering and maintaining the necessary tools, resources, and contacts for responding to incidents. Preparation can help a security analyst to be ready and proactive when an incident occurs, as well as to reduce the impact and duration of the incident.
Some of the activities that a security analyst performs during the preparation phase are:
Defining the roles and responsibilities of the incident response team members, such as the incident manager, the incident coordinator, the technical lead, the communications lead, and the legal advisor.
Establishing the incident response plan, which outlines the objectives, scope, authority, and procedures for responding to incidents, as well as the escalation and reporting mechanisms.
Developing the incident response policy, which defines the types and categories of incidents, the severity levels, the notification and reporting requirements, and the roles and responsibilities of the stakeholders.
Creating the incident response playbook, which provides the step-by-step guidance and checklists for handling specific types of incidents, such as denial-of-service, ransomware, phishing, or data breach.
Acquiring and testing the incident response tools, such as network and host-based scanners, malware analysis tools, forensic tools, backup and recovery tools, and communication and collaboration tools.
Identifying and securing the incident response resources, such as the incident response team, the incident response location, the evidence storage, and the external support.
Building and maintaining the incident response contacts, such as the internal and external stakeholders, the law enforcement agencies, the regulatory bodies, and the media.
References:
CompTIA Security+ SY0-701 Certification Study Guide, Chapter 6: Architecture and Design, Section 6.4:
Secure Systems Design, p. 279-280
CompTIA Security+ SY0-701 Certification Exam Objectives, Domain 3: Architecture and Design, Objective
3.5: Given a scenario, implement secure network architecture concepts, Sub-objective: Incident response, p. 16

Side loading is the process of installing applications from unofficial sources, often bypassing standard app stores. This increases the risk of installing malicious software, such as a rootkit, which is a type of malware designed to provide persistent privileged access while hiding its presence.
Reference:
CompTIA Security+ SY0-701 Official Study Guide, Domain 2.1: "Side loading applications from unofficial sources can introduce malware, such as rootkits, to the system." Exam Objectives 2.1: "Compare and contrast different types of threats."

Detailed Explanation:Standard operating procedures (SOPs) outline the steps to be followed to maintain a secure baseline, such as testing and deploying patches while minimizing risk to the system. Reference:
CompTIA Security+ SY0-701 Study Guide, Domain 4: Security Operations, Section: "Patch Management and Baseline Compliance".

Comprehensive and Detailed Explanation From Exact Extract:
Endpoint protection systems rely on policy rules, signatures, behavioral analytics, and heuristics. When the analyst identifies the event as a false positive, this indicates the file itself was not malicious, but the endpoint protection solution incorrectly identified it as a threat. According to CompTIA Security+ SY0-701 concepts, false positives commonly occur due to overly aggressive configuration settings, outdated rules, unrefined behavioral baselines, or incorrect threat signatures.
Zero-day vulnerabilities (B) would cause a true positive because the file contains unknown malware, not a false alert. A supply chain attack (C) would impact the vendor or update delivery, not a user download event.
Incorrect file permissions (D) prevent access but do not trigger malware alerts.
Misconfigurations are identified in SY0-701 under Security Operations # Monitoring, alerting, tuning, and false positives, which emphasizes the need for refining security controls to reduce erroneous blocks.
Therefore, the most likely cause of a blocked benign download is a misconfigured endpoint protection policy.