The Investigation Workbench is a feature within the Insight portal that helps analysts conduct threat investigations. It provides an enrichment tool called the investigation co-pilot, which pulls additional context and information from vendors regarding log activity. This assists analysts in making informed conclusions about potential threats.

The system identifies compromised users by analyzing sign-in patterns and activities. For example, if a user typically signs in from Ireland but suddenly has multiple sign-ins from locations like the United States, Nigeria, and Tanzania within a short time frame, it raises a flag. Additionally, suspicious activities such as the creation of unusual inbox rules and the use of untrusted devices are also indicators of compromise.

Telemetry plays a crucial role in the investigation process by providing detailed information about processes running on an endpoint. It helps analysts build a process tree, allowing them to trace back activities to their origins. For instance, if a WScript process is spawned by an application like OneNote, telemetry can reveal the chain of events leading to that execution, which is essential for understanding potential exploitation paths.