Direct answer
Confirm the affected device and alert time, inspect the supporting evidence and related activity, and escalate or close according to an explicit incident triage process.
Establish the scope
Match the alert to the device owner, operating system, network context and time. Check whether it is part of a broader incident or a known approved activity. A device name alone may be reused or stale, so correlate a stable identifier when available.
Examine supporting evidence
Review the alert's process, file or connection evidence and related timeline without executing suspicious material. Determine whether collection is incomplete or the signal is already contained. Microsoft describes device timeline and alert investigation in supported Defender deployments.
Reference: Microsoft: Investigate devices.
Decide and document
Escalate according to impact and confidence, preserving evidence and uncertainty. If closing as benign, record the reason, evidence and reviewer; a familiar process name alone is not proof. Assign any containment and follow-up actions to owners and check their outcome.
Correlate a familiar process
An alert for a common executable requires more than a name check. Compare its path, publisher or signature where available, parent process and timing with the approved software deployment. A missing signature or unusual path is a lead to investigate, not an automatic verdict; retain the underlying evidence for the reviewer.
Assessment limits
Alerts may be delayed, incomplete or wrong. One triaged signal cannot establish the full state of an endpoint or account.
Frequently asked questions
Is a high-severity alert proof of compromise?
No. Severity helps prioritize investigation; validate the evidence and context.
Does a familiar process name mean an alert is safe?
No. Examine the path, signer, parent and relevant behavior using approved tools.
What should a benign closure include?
Record the rationale, supporting evidence, reviewer and any remaining uncertainty.
Primary sources and further reading
These guides combine published security guidance with practical assessment planning. Adapt checks to the owner's policy, environment, and authorized scope.
This guide was prepared with AI assistance using the linked sources and illustrative examples. Check current vendor guidance and your environment before making changes.