Which tasks would a First Responder perform during the Identification phase of Incident Response?

The Identification phase (also known as Detection and Analysis) of the incident response lifecycle focuses on determining whether a security incident has occurred. A first responder's primary tasks during this phase are to analyze precursors and indicators from various data sources, such as logs, network traffic, and alerts. The goal is to validate a potential incident, assess its scope, and gather initial information. This involves searching for and correlating data to confirm the event's nature and impact, which directly aligns with the activities described in the correct option.

A. Verifying the root cause and patching are performed during the Eradication and Recovery phases, after the incident has been identified and contained.
B. Installing or enabling security software is a Containment or Eradication activity intended to limit the incident's spread or clean affected systems.
D. Disconnecting network communications is a core Containment strategy executed after an incident is confirmed to prevent further damage or propagation.

1. NIST Special Publication 800-61 Rev. 2, "Computer Security Incident Handling Guide":

Section 3.2.2, Detection and Analysis (Page 26): "The first step in this phase is to analyze the precursors and indicators... Incident analysis involves examining all available information... The team should also search for data from other sources that may be of value... The goal of the analysis is to determine the incident’s scope..." This directly supports the activities in option C.

Section 3.2.3, Containment, Eradication, and Recovery (Page 32): This section describes actions such as disconnecting systems from the network (supporting why D is incorrect) and eliminating components of the incident, such as patching vulnerabilities (supporting why A is incorrect).

2. Carnegie Mellon University, Software Engineering Institute, "Defining the Process for Handling Computer Security Incidents":

Section 3.2, "Analyze" (Page 10): This section, corresponding to the Identification phase, states that the incident handler's role is to "gather information from system and network logs, from the content of any suspicious files, and from any other pertinent sources." This validates that searching for and analyzing data is the key task in this phase.

3. SANS Institute, "The Six Steps of Incident Response":

Step 2: Identification: This step is described as the process of confirming a suspected breach and determining its scope. It involves "analyzing data from a number of sources" to answer questions like "who, what, where, when, and how." This aligns perfectly with option C and distinguishes it from later phases like Containment (disconnecting systems) and Eradication (patching).