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Control Acronym



Incident Response

CMMC Level


800-171 Control #


CMMC Description

Establish an operational incident-handling capability for organizational systems that includes preparation, detection, analysis, containment, recovery, and user response activities.

CMMC Clarification

Incident handling should include activities that prepare your organization to respond to incidents. These activities may include the following: * identify people inside and outside your organization you may need to contact during an incident * establish a way to report incidents, such as an email address or a phone number * establish a system for tracking incidents * determine a place and a way to store evidence of an incident. You may need software and hardware to analyze incidents when they occur. You should also consider incident prevention activities as part of your incident-handling capability. The incident handling team provides input for such things as risk assessments and training. Your organization should detect incidents in different ways. Use indicators to detect incidents. Indicators are things that don’t look like what you expect. Examples include: * alerts from your sensors or antivirus software * a filename that looks unusual * a log entry that raises concern. After you detect an incident, you should analyze it to decide what to do. To analyze an incident, you need to know what should be occurring on your network and what should not. This will help you determine when an incident may have occurred. It may also help you decide what to do about it. You should also document what you know about the incident. Include all the log entries associated with the incident in your documentation. Containment of the incident is important. This stops the damage the incident is causing to your network. You should base the containment activities you do off your incident analysis. These activities can include: * disconnecting a system from the internet * changing firewall settings to stop an attack. * Recovery activities are things to fix that caused the incident. This will help prevent the incident happening again. Recovery activities also include things that fix the affected systems, including: * restoring backup data * reinstalling software. User response activities include: * performing a lessons-learned analysis * deciding if you should contact the police * updating any policy or plans as a result of after incident analysis. Example 1 Your manager asks you to set up your organization’s incident-response capability. First, you create an email address to collect information on possible incidents. Next, you draft a contact list of all the people in the organization who need to know when an incident occurs. Then, you write down a procedure for how to submit incidents. This includes what everyone should do when a potential incident is detected or reported. The procedure also explains how to track incidents, from initial creation to closure. Example 2 You receive an email alert about a possible incident. An employee identified a suspicious email message as a phishing attempt. First, you document the incident in your incident tracking system. Then, you immediately reference your defined procedures for handling incidents. For example, you send an email to your employees alerting them not to open a similar email. You also start collecting information around the reported incident. Example 3 In response to the suspicious email, you perform a set of actions. You reinstall the software on the machine of the user involved. This means that the individual no longer has an infected machine. You update your phishing protection software. This ensures that it can block the latest phishing attacks. You update your training material to emphasize the threat of phishing emails.

800-171 Description

Establish an operational incident-handling capability for organizational systems that includes preparation, detection, analysis, containment, recovery, and user response activities.

800-171 Discussion

Organizations recognize that incident handling capability is dependent on the capabilities of organizational systems and the mission/business processes being supported by those systems. Organizations consider incident handling as part of the definition, design, and development of mission/business processes and systems. Incident-related information can be obtained from a variety of sources including audit monitoring, network monitoring, physical access monitoring, user and administrator reports, and reported supply chain events. Effective incident handling capability includes coordination among many organizational entities including mission/business owners, system owners, authorizing officials, human resources offices, physical and personnel security offices, legal departments, operations personnel, procurement offices, and the risk executive. As part of user response activities, incident response training is provided by organizations and is linked directly to the assigned roles and responsibilities of organizational personnel to ensure that the appropriate content and level of detail is included in such training. For example, regular users may only need to know who to call or how to recognize an incident on the system; system administrators may require additional training on how to handle or remediate incidents; and incident responders may receive more specific training on forensics, reporting, system recovery, and restoration. Incident response training includes user training in the identification/reporting of suspicious activities from external and internal sources. User response activities also includes incident response assistance which may consist of help desk support, assistance groups, and access to forensics services or consumer redress services, when required.[SP 800-61] provides guidance on incident handling. [SP 800-86] and [SP 800-101] provide guidance on integrating forensic techniques into incident response. [SP 800-161] provides guidance on supply chain risk management.

Other Source Discussion


CIS Control References

NIST 800-53 Control Ref.

NIST SP 800-53 Rev 4 IR-2, IR-4

CMMC Derived

NIST CSF Control References

NIST 800-171 References

NIST SP 800-171 Rev 1 3.6.1

Applicable FAR Clause

NIST CSF Control Reference

NIST CSF v1.1. RS.RP-1

CERT RMM Reference


Modification of NIST 800-171B Reference

NIST 800-171B Reference

UK NCSCCyber Reference

AS ACSC Reference


Assessment Sub-Criteria 1

IR.2.092.[a] an operational incident-handling capability is established;

Assessment Sub-Criteria 2

IR.2.092.[b] the operational incident-handling capability includes preparation;

Assessment Sub-Criteria 3

IR.2.092.[c] the operational incident-handling capability includes detection;

Assessment Sub-Criteria 4

IR.2.092.[d] the operational incident-handling capability includes analysis;

Assessment Sub-Criteria 5

IR.2.092.[e] the operational incident-handling capability includes containment;

Assessment Sub-Criteria 6

IR.2.092.[f] the operational incident-handling capability includes recovery; and

Assessment Sub-Criteria 7

IR.2.092.[g] the operational incident-handling capability includes user response activities.

Assessment Sub-Criteria 8

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Assessment Sub-Criteria 15