Resposta a incidentes é o processo de lidar com incidentes de segurança (violações, ataques) — detectar, conter, erradicar, recuperar e aprender. Como violações podem ocorrer apesar das defesas, ter um plano para responder efetivamente é importante para limitar danos.
Por que isso importa
Despite defenses, security incidents WILL happen (no system is perfectly secure):
→ being PREPARED to respond limits damage, downtime, and data loss
→ a poor/slow/panicked response makes breaches far worse
→ have a PLAN before you need it (you can't improvise a good response mid-crisis).
O ciclo de vida da resposta a incidentes
1. PREPARATION → plan, tools, roles, runbooks, monitoring/logging in place beforehand
2. DETECTION & ANALYSIS → identify the incident (monitoring, alerts); assess scope/severity
3. CONTAINMENT → stop the spread/limit damage (isolate affected systems, revoke access)
4. ERADICATION → remove the threat (close the vulnerability, remove malware/access)
5. RECOVERY → restore systems safely; verify they're clean; resume operations
6. POST-INCIDENT (lessons learned) → analyze what happened, improve defenses & the process
(BLAMELESS — focus on fixing, not blaming)
