No organization can completely eliminate the risk of cyberattacks. Even with strong security controls, vulnerabilities, human error, and sophisticated threat actors can eventually lead to a security incident. The difference between a minor event and a major breach often depends on how quickly and effectively the organization responds. This is why Incident Response (IR) is a critical component of every cybersecurity program.
For Security Operations Center (SOC) analysts, incident response is more than simply investigating alerts. It involves identifying suspicious activity, validating potential threats, containing compromised systems, and supporting recovery efforts. The MITRE ATT&CK framework helps analysts understand attacker behavior, while the NIST Cybersecurity Framework (CSF) and NIST SP 800-61, Computer Security Incident Handling Guide, provide guidance for building an effective incident response process.
What Is Incident Response?
Incident response is the structured process used to identify, manage, and recover from cybersecurity incidents.
Although organizations may use different procedures, incident response generally includes the following phases:
- Preparation
- Detection and Analysis
- Containment
- Eradication
- Recovery
- Lessons Learned
Each phase plays an important role in minimizing the impact of a security incident.
Preparation includes developing procedures, deploying security tools, and training personnel. Detection and analysis focus on identifying suspicious activity and determining whether an incident has occurred. Once confirmed, the organization works to contain the threat, remove the attacker’s access, restore normal operations, and improve defenses to prevent similar incidents in the future.
MITRE ATT&CK and Incident Investigation
The MITRE ATT&CK framework helps SOC analysts understand what attackers are attempting to accomplish during an incident.
For example, an investigation may identify T1059 – Command and Scripting Interpreter, followed by T1078 – Valid Accounts, and later T1021 – Remote Services. Mapping these techniques provides valuable insight into the attacker’s objectives and helps analysts predict possible next steps.
Rather than investigating isolated alerts, ATT&CK encourages analysts to understand how individual techniques fit together within a larger attack.
This approach improves prioritization and supports more effective containment decisions.
NIST Recommendations
The NIST Cybersecurity Framework emphasizes the importance of having documented incident response procedures before an incident occurs.
Organizations should establish communication plans, define roles and responsibilities, preserve forensic evidence, and regularly test their incident response process through tabletop exercises or simulations.
NIST SP 800-61 also recommends documenting lessons learned after each incident. Reviewing what happened, identifying weaknesses, and improving procedures helps strengthen future response efforts.
Incident response should be viewed as a continuous improvement process rather than a one-time activity.
Investigation Tips for SOC Analysts
When responding to an alert, analysts should avoid making conclusions based on a single event.
Instead, consider questions such as:
- How was the activity detected?
- Which systems are affected?
- What MITRE ATT&CK techniques are involved?
- Has the attacker established persistence or moved laterally?
- What evidence should be preserved before containment?
Answering these questions helps analysts make informed decisions while minimizing disruption to business operations.
Correlating authentication logs, endpoint telemetry, firewall records, DNS activity, and Windows Security Events provides the context needed for accurate investigations.
Conclusion
Effective incident response is one of the most important capabilities of a mature cybersecurity program. While preventive controls reduce risk, organizations must also be prepared to respond quickly when attacks occur.
By combining the behavioral guidance of the MITRE ATT&CK framework with the structured incident response recommendations provided by the NIST Cybersecurity Framework and NIST SP 800-61, SOC analysts can investigate incidents more effectively, reduce attacker dwell time, and improve organizational resilience. Successful incident response is not only about stopping an attack—it is about learning from every incident and continuously strengthening the organization’s security posture.