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Detection-Rule-License (DRL)

The Detection Rule License (DRL) is a license for open-source detection logic as shared in, e.g. YARA, Sigma, or Snort rules.

It is very permissive and allows the private and commercial use of the detection logic as long as the rule's author is mentioned in the reproduction of the rules and an output showing matches with the licensed rule.

One could also say: "You can do anything with the rule as long as you give credit to the author."

The attribution is also required when showing matches with the detection rules licensed under the DRL. Vendors using a rule licensed under DRL must include the author in views that show matches. (e.g., in a separate field or column)

License Text

The full license text can be found here.

This location will not change and can be used in order to link to the license text.

Characteristics

Characteristic Value
Based on MIT license
Distribution Yes
Modification Yes
Private Use Yes
Commercial Use Yes
Liability No
Warranty No
License and Copyright Notice Yes
Author Attribution Required

Version History

Version 1.1

May 2021, Extended the section that contains the requirements regarding matches with a licensed rule (changes)

Version 1.0

February 2020, Initial version

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