Home > Cybersecurity glossary > Incident Response Plan (IRP) 🟩 Document

Incident Response Plan (IRP) 🟩 Document

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.


🎯 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

 


πŸ“‚ 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

 


βš™οΈ How it works / How to implement it

  1. Preparation
    • Set up a dedicated team (CSIRT/CERT)
    • Drawing up procedures and roles
    • Carry out regular simulations
  2. Detection and analysis
    • Continuous monitoring via SIEM, IDSlogs
    • Incident confirmation, classification and impact
  3. Containment
    • Isolate affected systems to prevent propagation
  4. Eradication
    • Remove the cause of the incident (malware, backdoor...)
  5. Recovery
    • Restoring systems, checking their integrity, gradual reintegration
  6. Lessons learned
    • Incident report
    • Updating procedures

 


πŸ’₯ Consequences

  • Without PRI Long response times, increased losses, panic, poor communication
  • With PRI improved responsiveness, limited damage, assured continuity, better image

βš–οΈ 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

 


🚧 Challenges

 

  • Keep the plan up to date.
  • Coordinate stakeholders effectively.
  • Managing crisis communication.
  • Get management on board.

 


πŸ”„ Recent developments

 

Towards the ORSYS Cyber Academy: a free space dedicated to cybersecurity