SIGMA-detection-rules VS Azure-Sentinel

I am currently employed as a cyber analyst, and we've recently implemented an Endpoint Detection and Response (EDR) system. Upon closer inspection, I've observed that numerous events are not being flagged as alerts. This raises a crucial question: should I take the initiative to create custom rules to ensure these events are brought to our attention, or should I rely solely on the EDR's intrinsic capabilities to detect and classify threats? As a potential solution, I'm contemplating the implementation of rules based on Sigma, such as those available at the following repository: here. Your insights and experiences on the effectiveness of this approach would be greatly appreciated. Thank you for your time and assistance.

Depending on whether this is up your alley either look for a MSSP/MDR/Managed BlaBla provider or head on to - https://github.com/splunk/security_content - https://www.elastic.co/guide/en/security/current/prebuilt-rules.html - https://github.com/mdecrevoisier/SIGMA-detection-rules - https://github.com/Azure/Azure-Sentinel to get an idea of what to look for. MITRE ATT&CK and the related DETT&CT should serve as an additional eye opener. Ah yes - forgot the bible on log management from Anton Chuvakin in the above list.

Azure-Sentinel/Playbooks/CreateIncident-SharedMailbox at master · Azure/Azure-Sentinel · GitHub

They recently reorganized the GitHub: https://github.com/Azure/Azure-Sentinel/blob/master/Workbooks/LogSourcesAndAnalyticRulesCoverage.json

Have you checkout out the azure playbook templates? https://github.com/Azure/Azure-Sentinel/tree/master/Playbooks

The best option I could find so far is inferring the format by reading the source code at https://github.com/Azure/Azure-Sentinel/blob/master/Parsers/AzureFirewall/AzureFirewallNetworkRule.kql.

There is a ton on Github. Have a look here -> https://github.com/Azure/Azure-Sentinel/wiki

Also see the Sentinel repository on GitHub for a ton of queries to reference: https://github.com/Azure/Azure-Sentinel

All the json files are stored in MS Sentinels github repo: https://github.com/Azure/Azure-Sentinel/tree/master/Playbooks. You do not need to export them yourself. You can copy the raw json file from the repository.

here you can find various other types: https://github.com/Azure/Azure-Sentinel/tree/master/Parsers