The Most Dangerous Gap May Be Invisible
Security incidents rarely involve a single obvious event. An attacker may begin with phishing, obtain a credential, access a remote service, escalate privileges and extract sensitive data. Each step may appear harmless independently.
The SIEM connects these activities. If log sources remain split between old and new platforms, the complete attack sequence may no longer be visible in one place. Logs being collected is not the same as threat detection.
The important question is whether the organisation can still correlate related activity, detect critical attack scenarios and escalate alerts to the right responders in time.
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