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detectionlint / library / spl

O365 Email Transport Rule Changed

splApache-2.0from splunk/security_content

The following analytic identifies when a user with sufficient access to Exchange Online alters the mail flow/transport rule configuration of the organization. Transport rules are a set of rules that can be used by attackers to modify or delete emails based on specific conditions, this activity could indicate an attacker hiding or exfiltrated data.

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fp risk—
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