How do you troubleshoot a suspected data breach in its early stages?

1. Confirm the indicator is real by checking logs, alerts, and system behavior rather than acting on assumption
2. Establish a timeline by determining when the suspicious activity started and what systems were touched
3. Isolate affected systems from the network to stop further spread, without powering them off if memory forensics may be needed
4. Preserve evidence, including logs, memory dumps, and disk images, before making further changes
5. Identify the initial entry point and scope, checking for lateral movement, privilege escalation, and data exfiltration
6. Notify the incident response team and relevant stakeholders per the organization's breach response plan

Acting too fast, like immediately wiping a compromised server, can destroy the forensic evidence needed to understand what actually happened and whether the attacker is still present elsewhere in the environment.

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