The ANSSI document “Cyber attacks and remediation: Managing the remediation” provides a comprehensive framework for regaining control of a compromised information system following a major cyber incident. It defines remediation as the process to restore operational status and ensure organizational survival by following a structured approach summarized by the acronym CEER: Containment (slowing the attacker), Eviction (removing the attacker from the trusted core), Eradication (cleaning any residual footholds), and Reconstruction (rebuilding compromised infrastructure). The remediation plan is built around strategic objectives set with senior management and broken down into operational goals, mobilizing internal and external resources. ANSSI outlines three typical remediation scenarios reflecting different priorities and urgency levels: restoring critical services quickly, regaining control of the information system, and using remediation as an opportunity to strengthen long-term security. The document emphasizes the importance of coordination, continuous communication with decision-makers, and realistic eradication efforts supplemented by detection and response capabilities to prevent attacker re-entry and ensure resilience.
Publication's URL
URL: https://cyber.gouv.fr/en/publications/cyber-attacks-and-remediation-managing-remediationPublication's scorecard
Country: FRA
Scope: Cyber
Typology: Standard
Publication's date: April 16, 2025
Category: Attack Recovery
Sector: Cross-Sector
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