Microsoft 365 Anomalous Amount of Downloaded files

Classification:

attack

Tactic:

Technique:

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Goal

Detect when a Microsoft 365 user downloads an anomalous amount of files. This could be an indicator of data exfilteration.

Monitor Microsoft 365 audit logs to look for an anomalous amount of logs with an @evt.name value of @evt.name:FileDownloaded.

Determine if the user {{@usr.email}} intended to download the files.
If {{@usr.email}} is not responsible for file downloads, investigate {{@usr.email}} for anomalous activity. If necessary, initiate your company’s incident response (IR) process.