𝗖𝗦𝗜𝗥𝗧: 𝗧𝘂𝗿𝗻𝗶𝗻𝗴 𝗜𝗻𝗰𝗶𝗱𝗲𝗻𝘁𝘀 𝗜𝗻𝘁𝗼 𝗖𝗼𝗻𝘁𝗿𝗼𝗹
A CSIRT is not a ticket team. It is not a group of heroes. It is an operational function. It confirms incidents. It coordinates response. It reduces impact. It forces you to learn from failure.
You see the value during a crisis. Without a CSIRT, you ask who decides. With a CSIRT, you have an owner. You have a plan. You have a communication channel.
A CSIRT reduces four time windows:
- Time to detect
- Time to understand
- Time to contain
- Time to recover
A good CSIRT does not do everything. It coordinates. Infra changes things. Legal checks risks. Comms speaks to clients. Engineering fixes the root cause. The CSIRT keeps the process coherent.
An alert is a signal. An incident is a confirmed violation. Treat every alert as an incident and you burn your team. Treat an incident as a simple alert and you burn your company.
Use this flow: Signal -> Triage -> Investigation -> Incident Declaration -> Containment -> Eradication -> Recovery -> Lessons Learned
Use operational severity.
- SEV-1: Active compromise. Production impact. Likely exfiltration.
- SEV-2: Limited compromise. Leaked credentials.
- SEV-3: Blocked attempt.
- SEV-4: Noise. False positive.
Opinions without evidence hurt. Preserve your logs. Save network data. Keep disk snapshots. Track who did what and when.
Containment stops the bleeding. Correction removes the cause.
- Blocking an IP does not fix a leaked password.
- Restarting a server does not remove a webshell.
- Patching does not stop data theft already happened.
Silence creates chaos. Bad communication creates panic. Use one source of truth.
A playbook is a ready decision. You need them for ransomware, phishing, and cloud abuse.
Stop measuring closed alerts. Measure these:
- MTTD: Time to detect
- MTTA: Time to acknowledge
- MTTC: Time to contain
- MTTR: Time to recover
Tools are not a CSIRT. SIEM, EDR, and SOAR are tools. Process is the CSIRT. People decide severity. People coordinate recovery.
Do you have a clear policy? Do you have tested playbooks? Do you have tested backups? If not, you have good intentions. You do not have a CSIRT.
Avoiding every incident is impossible. Your goal is to stop an incident from becoming a collapse.
Source: https://dev.to/m2hcz/csirt-o-time-que-transforma-incidente-em-controle-1g1k