Data Breach Response: What Brazilian Companies Should Do in the First 72 Hours

When a security incident strikes, the clock starts ticking instantly. For organizations operating under the jurisdiction of the Lei Geral de Protecao de Dados (LGPD), the pressure is intensified by strict regulatory reporting requirements. Knowing exactly what a brazilian do first 72 hours strategy looks like can mean the difference between a controlled recovery and a catastrophic regulatory penalty.

The Urgency of the 72-Hour Window

Under Article 48 of the LGPD, a data controller must communicate the occurrence of a security incident that may create risk or relevant damage to the data subjects to the Autoridade Nacional de Protecao de Dados (ANPD) and the data subjects themselves within a reasonable timeframe. While the law uses the term reasonable, the 72-hour window has become the industry standard for effective incident response and is the baseline expectation for regulators.

This timeframe is not merely for notification; it is the critical window for containment, assessment, and stabilization. If your organization fails to act decisively, you risk exacerbating the damage, losing forensic evidence, and demonstrating a lack of compliance maturity to the ANPD.

Immediate Action Plan: Hours 0 to 24

The first day is dedicated to identification and containment. You must determine the scope of the breach immediately.

• Activate the Incident Response Team: Assemble your pre-defined crisis management group, including legal counsel, IT security, PR, and executive leadership.
• Contain the Breach: Isolate affected servers, revoke compromised credentials, and disable vulnerable network segments to prevent further exfiltration.
• Document Everything: Start a detailed timeline of events. This contemporaneous log is vital for your data protection audit trail.
• Preserve Forensic Evidence: Before rebooting or patching, capture volatile memory and system logs. Without this, you cannot perform a root cause analysis later.

Assessment and Strategy: Hours 24 to 48

By the second day, your tech-security teams should have enough data to determine the severity of the incident.

During this phase, assess whether the incident involves sensitive personal data, such as financial details or health records, as these require a heightened standard of care and notification.

Reporting and Communication: Hours 48 to 72

The final stretch of the first three days focuses on fulfilling your legal obligations. If the incident poses a significant risk to rights and liberties, you must notify the ANPD. Your report should clearly detail the nature of the data affected, the measures taken for mitigation, and the risks identified.

Real-Life Scenario: The Credential Stuffing Attack

Consider a hypothetical mid-sized Brazilian e-commerce platform that detects a surge in unauthorized login attempts. By hour 10, they confirm that 5,000 user accounts were accessed. By hour 40, they identify that the attackers utilized a credential stuffing technique. Because they had an incident response plan, they successfully reset all affected passwords by hour 50 and notified the ANPD by hour 65. Because they acted within the 72-hour window, they mitigated the regulatory fallout significantly compared to a company that hid the breach until the following week.

Frequently Asked Questions

Do I have to report every incident to the ANPD?

Not every incident requires notification. The LGPD requires reporting only when the incident may result in relevant risk or damage to data subjects.

What happens if I cannot meet the 72-hour deadline?

If you cannot meet the timeframe, you must provide a strong, documented justification to the ANPD explaining why the delay occurred and what measures were taken to compensate.

Who is responsible for the notification?

The data controller is primarily responsible for notifying the authority, though data processors may be contractually obligated to assist in the investigation.

Conclusion

Mastering what a brazilian do first 72 hours plan entails is an exercise in preparedness, not improvisation. By establishing a clear incident response framework, documenting every action, and maintaining open lines of communication with legal and technical teams, organizations can fulfill their obligations and maintain the trust of their customers. Remember, transparency is your best defense when dealing with the ANPD, and swift action remains the most effective tool in your data security arsenal.