Detections
Analytics

MS.EXO.9.1v2 - Emails SHALL be filtered by attachment file types.

Information

Malicious attachments often take the form of click-to-run files. Sharing high risk file types, when necessary, is better left to a means other than email; the dangers of allowing them to be sent over email outweigh any potential benefits. Filtering email attachments based on file types can prevent spread of malware distributed via click-to-run email attachments.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Any product meeting the requirements outlined in this baseline policy may be
used. If the agency uses Microsoft Defender, see the following
implementation steps for
[enabling preset security policies](./defender.md#implementation), which
include email filtering based on attachment file type.

See Also

https://github.com/cisagov/ScubaGear/tree/v1.8.0/

Item Details

Category: SYSTEM AND INFORMATION INTEGRITY

References: 800-53|SI-3

Plugin: microsoft_azure

Control ID: f357aebe33931865037db563282a71bda48fd36cf5a4e7e1d5f26f2094d55abd