NYDFS Incident Response Plan for 23 NYCRR 500: What Your Organization Needs to Build
A cybersecurity incident is not a matter of if but when. NY DFS 23 NYCRR Part 500 recognizes this reality and requires every covered entity to have a written, tested incident response plan in place before an event occurs. Amendment 2, effective November 1, 2024, significantly expanded these requirements, adding mandatory business continuity planning, ransomware-specific procedures, and new reporting obligations that carry serious legal consequences if missed.
This guide covers exactly what your incident response plan must include, what Amendment 2 changed, how the notification process works, and how to keep your plan compliant year after year.
What Is a Cybersecurity Event Under 23 NYCRR 500?
Under the regulation, a cybersecurity event is any act or attempt, whether successful or not, to gain unauthorized access to, disrupt, or misuse an information system or the information stored on it. This definition is intentionally broad. An attempted phishing attack that never succeeded is still a cybersecurity event. A ransomware infection, a drive-by download, an insider threat, or a misconfigured system that exposed Non-Public Information all qualify.
Not every cybersecurity event triggers a mandatory notification to the NY DFS superintendent. Notification is required when the event has a reasonable likelihood of materially harming any part of normal business operations or requires notification to any other government, supervisory, or regulatory body under other applicable laws.
What Must Be in Your Incident Response Plan
Section 500.16 requires every covered entity to maintain a written incident response plan. The plan must address the following areas for different types of cybersecurity events including ransomware:
The goals of the incident response plan
Internal processes for responding to a cybersecurity event
Clear definitions of roles, responsibilities, and decision-making authority
Guidelines for external and internal communications and information sharing
Requirements for remediating weaknesses identified in information systems or controls
Documentation and reporting procedures for cybersecurity events and response activities
Recovery from backups
A root cause analysis process describing how and why the event occurred, what business impact it had, and what will be done to prevent recurrence
A process for updating the plan after a cybersecurity event
The root cause analysis requirement is one that many organizations overlook. After every material incident, your team must produce a written analysis that documents the cause, the business impact, and the steps taken to prevent it from happening again. This document becomes part of your compliance evidence.
What Amendment 2 Added to Incident Response
Amendment 2 made incident response one of the most significantly updated areas of the regulation. Organizations that built their plans against the original 2017 requirements need to update them.
Business continuity and disaster recovery plans are now mandatory. Section 500.16 now requires a formal Business Continuity and Disaster Recovery plan alongside the incident response plan. The BCDR plan must identify documents, data, facilities, infrastructure, and personnel essential to continued operations, include procedures for timely recovery of critical systems and data, establish communication protocols for cybersecurity-related disruptions, and identify third parties necessary for continued operations.
Ransomware is explicitly addressed. The regulation now specifically names ransomware as a scenario your incident response plan must account for. General incident response procedures are no longer sufficient on their own.
Extortion payment reporting is now required. If your organization makes a payment in response to a ransomware attack or extortion demand, two separate obligations are triggered. Within 24 hours of the payment, you must notify the NY DFS superintendent. Within 30 days, you must submit a written description explaining why payment was necessary, what alternatives were considered, and what due diligence was performed including any Office of Foreign Assets Control compliance checks.
The 72-Hour Notification Process
When a cybersecurity event occurs that meets the notification threshold, covered entities must notify the NY DFS superintendent electronically within 72 hours of determining that the event occurred. The clock starts when you determine the event happened, not when it is fully investigated or remediated.
The notification is submitted through the NY DFS portal. After the initial notice, covered entities have a continuing obligation to update the superintendent with any material changes or new information that was not previously available. Your incident response plan should include a documented notification workflow that assigns ownership, defines what information needs to be gathered within the 72-hour window, and identifies who is authorized to submit the notification.
Annual Testing Requirements
Having a written plan is not enough. Section 500.16 requires every covered entity to test its incident response and business continuity plans at least annually with all staff and management critical to the response. The test results must be reviewed and the plan revised as necessary.
Annual testing must also include testing your ability to restore critical data and information systems from backups. Your plan should document the testing methodology, who participated, what the test revealed, and what changes were made as a result.
How Incident Response Connects to the April 15 Certification
Every year by April 15, your highest-ranking executive and CISO must sign a certification of material compliance submitted to the NY DFS superintendent. The status of your incident response and BCDR plans, any material cybersecurity events that occurred during the year, and the steps taken to remediate material inadequacies are all part of what that certification covers.
This means every gap in your incident response program, an untested plan, a missing BCDR document, or an undocumented root cause analysis, is a potential compliance gap that affects what your leadership can honestly certify. Organizations that treat incident response as a standalone IT exercise rather than a compliance obligation are the ones most exposed when April 15 arrives.
Where Most Organizations Fall Short
The most common incident response gaps we find include:
Written plans that were never updated after Amendment 2 took effect
No formal BCDR plan alongside the incident response plan
No documented ransomware-specific procedures
Notification workflows that have never been tested or timed against the 72-hour requirement
Missing root cause analysis documentation from past incidents
Annual testing that is informal or undocumented
No assigned ownership for the notification submission process
Building a Plan That Holds Up Under Examination
A DFS examiner reviewing your incident response program will look for a written plan that addresses every required element, evidence of annual testing with documented results, root cause analyses for any material incidents, BCDR documentation, and proof that the plan was updated after any significant event or material change in the business.
Absolute Logic helps financial services organizations and technology vendors build incident response and business continuity programs that satisfy every requirement of 23 NYCRR Part 500 and hold up under real DFS scrutiny. Contact us today to schedule an assessment of your current incident response program.
Frequently Asked Questions
What triggers a mandatory notification to the NY DFS superintendent? A cybersecurity event must be reported when it has a reasonable likelihood of materially harming any part of normal business operations or requires notification to any other regulatory body. The notification must be made within 72 hours of determining the event occurred.
Does the incident response plan need to cover ransomware specifically? Yes. Amendment 2 explicitly requires incident response plans to address ransomware as a specific event type. A general incident response plan without ransomware-specific procedures does not fully satisfy the current requirements.
How often must the incident response plan be tested? At minimum annually, with all staff and management critical to the response involved. The test must also include testing the ability to restore critical data and systems from backups.
What is the extortion payment reporting requirement? If your organization makes a payment in response to a ransomware attack or extortion demand, you must notify the NY DFS superintendent within 24 hours of the payment and submit a full written explanation within 30 days.
Can a third-party provider help us meet incident response requirements? Yes. Section 500.4 allows a third-party provider to serve as or support the CISO function, and third-party providers can assist with building, testing, and maintaining incident response and BCDR plans provided the covered entity retains full compliance responsibility.
