Le incident response plan (PRI or IRP - Incident Response Plan) is a set of predefined procedures aimed at detecting, analysing, containing, eradicating and recovering from a cyber security (intrusion, ransomware, data leakageetc.). It aims to react effectively to minimise the technical, financial and reputational impact.
π― Objectives
- Limiting the damage caused by security incidents
- Restore services quickly reviews
- Preserving evidence for post-incident analysis or prosecution
- Informing stakeholders internal and external
- Improving resilience organisational and processes
π Types of incidents concerned
- Network intrusion or compromise
- Ransomware or malware
- Phishing or theft of identifiers
- Data leakage or exfiltration
- Denial of service (DDoS)
- Technical failure or human error affecting safety
βοΈ How it works / How to implement it
- Preparation
- Set up a dedicated team (CSIRT/CERT)
- Drawing up procedures and roles
- Carry out regular simulations
- Detection and analysis
- Containment
- Isolate affected systems to prevent propagation
- Eradication
- Remove the cause of the incident (malware, backdoor...)
- Recovery
- Restoring systems, checking their integrity, gradual reintegration
- Lessons learned
- Incident report
- Updating procedures
π₯ Consequences
- Without PRI Long response times, increased losses, panic, poor communication
- With PRI improved responsiveness, limited damage, assured continuity, better image
βοΈ Advantages/Disadvantages
Advantages :
- Reducing the impact of attacks
- Strengthening customer confidence
- Compliance with legal obligations
Disadvantages :
- Initial implementation cost
- Resources to be allocated to monitoring and training
π§ Challenges
- Keep the plan up to date.
- Coordinate stakeholders effectively.
- Managing crisis communication.
- Get management on board.
π Recent developments
- Automated responses via SOAR.
- Integration ofartificial intelligence in detection
- Collaboration between national and private CERTs
- Compliance with RGPD and NIS 2
