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 - [MITRE Cyber Analytics Repository (CAR)](https://car.mitre.org) - MITRE's well-maintained repository of detection content.
 - [CAR Coverage Comparision](https://car.mitre.org/coverage/) - A matrix of MITRE ATT&CK technique IDs and links to available Splunk Security Content, Elastic detection rules, Sigma rules, and CAR content.
 - [Sigma Rules](https://github.com/Neo23x0/sigma) - Sigma's repository of turnkey detection content. Content can be converted for use with most SIEMs.
-- [Uncoder Rule Converter](https://uncoder.io) - A tool that can convert detection content for use with most SIEMs.
+- [Sigma rule converter](https://sigconverter.io/) - An opensource tool that can convert detection content for use with most SIEMs.
 - [Splunk Security Content](https://github.com/splunk/security_content) - Splunk's open-source and frequently updated detection content that can be tweaked for use in other tools.
 - [Elastic Detection Rules](https://github.com/elastic/detection-rules/tree/main/rules) - Elastic's detection rules written natively for the Elastic SIEM. Can easily be converted for use by other SIEMs using Uncoder.
 - [Elastic Endpoint Behavioral Rules](https://github.com/elastic/protections-artifacts/tree/main/behavior/rules) - Elastic's endpoint behavioral (prevention) rules written in EQL, natively for the Elastic endpoint agent.