NIST CSF
CyberSecurity Framework
Risk Assessment & Management
Federico Calzolari, Scuola Normale Superiore - EDIH Tuscany X.0
NIST
(US) National Institute of Standards and Technology
Bio
Federico Calzolari
Email: federico.calzolari@sns.it
Web: https://cern.ch/fede
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Contents
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CyberCrime Statistics
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The invention of the Web
Tim Berners-Lee, CERN 1989:
Tim Berners-Lee:
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Internet Rule 34
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Internet Rule 34-bis
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For every technological invention there is "at least"�one fall into the world of crime
Anatomy of an Attack
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MITRE ATT&CK (Adversarial Tactics, Techniques, and Common Knowledge)
guideline for classifying and describing cyberattacks and intrusions
The only limit is your imagination
Cyberattacks Reasons
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Cybersecurity Basics
Cybersecurity
Protecting electronic devices and associated data/information.
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Legislative Framework
Cybersecurity
Privacy
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Complexity of a modern business
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Cybersecurity Objectives
Confidentiality
Protecting information from unauthorized access and disclosure
Example: Criminal steals customers usernames, passwords, or credit card information.
Integrity
Protecting information from unauthorized modification
Example: Someone alters payroll information or a proposed product design.
Availability
Preventing disruption in how information is accessed
Example: Your customers are unable to access your online services.
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confidentiality
integrity
availability
Small Business, Big Impact
Why put your already limited resources into preparing for and protecting against cybersecurity attacks?
Vulnerability: Attackers can see small businesses as easy targets.
Business Costs: Attacks can be extremely costly and threaten the viability of your business.
Reputation: Customers and employees expect and trust you to keep their information secure.
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Cybersecurity Threats
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[Cyber] Risk Management
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Risk Assessment
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Risk Assessment: What next?
Risk Assessment Goals:
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Risk Management
List the types of information, processes, important people and technology your business relies upon.
What would happen to my business if my asset was made public, damaged or unreachable?
Consider the impact to your business if each asset were lost, damaged, or reduced in value (e.g. intellectual property revealed to competitors).
List the threats to each business asset. Evaluate the likelihood that the asset may be lost or damaged by the threats.
Assign priorities according to impact and likelihood scores and Identify potential solutions: Assets with high impact and/or likelihood scores should be assigned top priorities.
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Risk Scoring
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Risk Analysis
Risk = Impact x Likelihood
Likelihood: Probability a potential risk occurring
Residual Risk = Inherent Risk - Impact of risk Controls
Inherent Risk x (1 - Treatment%)
Residual Risk: risk remaining after security measures have been applied
Risk Mitigation Strategies:
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Risk Management Table
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Risk Matrix
Prioritize Assets
Company processes Maturity levels
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Maturity levels Costs
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NIST CSF: Cybersecurity Framework
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NIST CSF: Cybersecurity Framework
NIST CSF consists of 3 main components:
https://www.nist.gov/cyberframework/online-learning/components-framework
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NIST CSF: Core
Core: desired cybersecurity activities and outcomes.
NIST CSF is a set of security and privacy controls for improving critical infrastructures cybersecurity, based on NIST SP 800 controls catalog.
NIST SP 800: 20 Families, 1007 Controls
NIST CSF: 5 Functions, 23 Categories, 108 Controls
ISO 27001: 4 Themes, 93 Controls
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NIST
CSF
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Subcategory | Informative References |
ID.BE-1: The organization’s role in the supply chain is identified and communicated | COBIT 5 APO08.04, APO08.05, APO10.03, APO10.04, APO10.05 ISO/IEC 27001:2013 A.15.1.3, A.15.2.1, A.15.2.2 NIST SP 800-53 Rev. 4 CP-2, SA-12 |
ID.BE-2: The organization’s place in critical infrastructure and its industry sector is identified and communicated | COBIT 5 APO02.06, APO03.01 NIST SP 800-53 Rev. 4 PM-8 |
ID.BE-3: Priorities for organizational mission, objectives, and activities are established and communicated | COBIT 5 APO02.01, APO02.06, APO03.01 ISA 62443-2-1:2009 4.2.2.1, 4.2.3.6 NIST SP 800-53 Rev. 4 PM-11, SA-14 |
ID.BE-4: Dependencies and critical functions for delivery of critical services are established | ISO/IEC 27001:2013 A.11.2.2, A.11.2.3, A.12.1.3 NIST SP 800-53 Rev. 4 CP-8, PE-9, PE-11, PM-8, SA-14 |
ID.BE-5: Resilience requirements to support delivery of critical services are established | COBIT 5 DSS04.02 ISO/IEC 27001:2013 A.11.1.4, A.17.1.1, A.17.1.2, A.17.2.1 NIST SP 800-53 Rev. 4 CP-2, CP-11, SA-14 |
Function | Category | ID |
Identify | Asset Management | ID.AM |
Business Environment | ID.BE | |
Governance | ID.GV | |
Risk Assessment | ID.RA | |
Risk Management Strategy | ID.RM | |
Supply Chain Risk Management | ID.SC | |
Protect | Identity Management & Access Control | PR.AC |
Awareness and Training | PR.AT | |
Data Security | PR.DS | |
Information Protection Processes & Procedures | PR.IP | |
Maintenance | PR.MA | |
Protective Technology | PR.PT | |
Detect | Anomalies and Events | DE.AE |
Security Continuous Monitoring | DE.CM | |
Detection Processes | DE.DP | |
Respond | Response Planning | RS.RP |
Communications | RS.CO | |
Analysis | RS.AN | |
Mitigation | RS.MI | |
Improvements | RS.IM | |
Recover | Recovery Planning | RC.RP |
Improvements | RC.IM | |
Communications | RC.CO |
1. Identify
Develop organizational understanding to manage cybersecurity risk to systems, assets, data, and capabilities.
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Business
Environment
[ID.BE]
Asset Management
[ID.AM]
Governance
[ID.GV]
Risk Assessment
[ID.RA]
2. Protect
Develop and implement the appropriate safeguards to ensure delivery of services.
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Data Security
[PR.DS]
Awareness and Training
[PR.AT]
Protective Technology
[PR.PT]
Identity Management and Access Control
[PR.IP]
Maintenance
[PR.MA]
Information Protection Processes and Procedures
[PR.IP]
3. Detect
Develop and implement the appropriate activities to identify the occurrence of a cybersecurity event.
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Anomalies and Events
[DE.AE]
Continuous Monitoring
[DE.CM]
4. Respond
Develop and implement the appropriate activities to take action regarding a detected cybersecurity event.
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Response Planning
[RS.RP]
Communications
[RS.CO]
5. Recover
Develop and implement the appropriate activities to maintain plans for resilience and to restore any capabilities or services that were impaired due to a cybersecurity event.
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Recovery Planning
[RC.RP]
Communications
[RC.CO]
NIST CSF
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Recovery Planning
[RC.RP]
Communications
[RC.CO]
Response Planning
[RS.RP]
Communications
[RS.CO]
Data Security
[PR.DS]
Awareness and Training
[PR.AT]
Protective Technology
[PR.PT]
Identity Management and Access Control
[PR.IP]
Maintenance
[PR.MA]
Information Protection Processes and Procedures
[PR.IP]
Continuous Monitoring
[DE.CM]
Anomalies and Events
[DE.AE]
Business
Environment
[ID.BE]
Asset Management
[ID.AM]
Governance
[ID.GV]
Risk Assessment
[ID.RA]
NIST CSF: Implementation Tiers
Implementation Tiers: the degree of rigor in cybersecurity risk management practices.
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NIST CSF: Profiles
Profiles: the organization's alignment of their requirements against the CSF Core.
The profile creation and the gap analysis allows organizations to create a prioritized implementation plan and define a roadmap / action plan.
Ex: profile AS_IS vs TO_BE
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NIST CSF: Framework Implementation
Framework implementation process in 7 steps:
1: Prioritize and Scope | 2: Orient | 3: Create a Current Profile | 4: Conduct a Risk Assessment | 5: Create a Target Profile | 6: Determine, Analyze, and Prioritize Gaps | 7: Implement Action Plan
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NIST CSF: Visualization Tools
Framework Results Visualization Tools
- https://csf.tools/visualizations/csf-sunburst/ # NIST CSF Visualization Tools
- https://johnmasserini.com/resources/downloads # NIST CSF Maturity Tool: Radar chart [Excel]
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NIST CSF: Results Chart
Framework Results Chart
Another way Security Assessment metrics can be presented is in a radar chart. In this chart, the Framework controls are ranked with respect to their target values.
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NIST CSF: per year Comparison
Framework Results Charts [per year]
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Everyday Tips (from NIST)
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Cybersecurity Framework Italiano
CINI Consorzio Interuniversitario Nazionale per l'Informatica
Framework Nazionale per la Cybersecurity e la Data Protection
https://www.cybersecurityframework.it
CyberSecurity Framework Tool: insieme di strumenti che intendono agevolare l'adozione e la diffusione del Framework Nazionale di cyber security. Il Framework può aiutare un’impresa a organizzare un percorso di gestione del rischio cyber, sviluppato nel tempo, in funzione del suo business, della sua dimensione e di altri elementi caratterizzanti e specifici dell'impresa.
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Cybersecurity Framework - Componenti
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Cybersecurity Framework - Procedura
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Cybersecurity Framework - Steps
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Risk Assessment aziendale: IPOTESI di Lavoro
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Cybersecurity Framework utilizzabili
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Formazione aziendale
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