You are a security analyst at an organization that uses Google Security Operations (SecOps).

Comprehensive and Detailed 150 to 250 words of Explanation From Exact Extract Google Security Operations Engineer documents:

To determine if isolated events are part of a "coordinated attack," an analyst needs to pivot on the Indicators of Compromise (IOCs) such as Source IP, User Agent, or ASN to see if they appear across other accounts or timelines. UDM Search is the primary tool for this rapid ad-hoc investigation.

The documentation on UDM Search states it allows analysts to "search through all of your security data" to find specific events. By extracting the IOCs (e.g., the source IP of the bad login) and running a UDM search, you can instantly see if that same IP has targeted other users, which would confirm a coordinated password spraying or brute force campaign.

Option B suggests using a Dashboard. While dashboards provide high-level visibility, they are generally pre-aggregated views and are less effective than UDM Search for the specific, granular "rapid pivoting" required to link specific disparate login attempts to a single coordinated actor in real-time. Options C and D are remediation/prevention steps, not investigation steps.