Downloadable rule updates

This section lists all updates to prebuilt detection rules, made available with the Prebuilt Security Detection Rules integration in Fleet.

To update your installed rules to the latest versions, follow the instructions in Update Elastic prebuilt rules.

For previous rule updates, please navigate to the last version.

Update version	Date	New rules	Updated rules	Notes
8.15.5	17 Sep 2024	22	6	This release includes new rules for Windows,Linux, MacOS, AWS Bedrock, Azure, Okta and Microsoft 365 integration. New rules for Windows include detection for privilege escalation, command and control, persistence, defense evasion and execution. New rules for Linux include detection for defense evasion, execution and credential access. New rules for MacOS include detection for privilege escalation. New rules for AWS Bedrock include detection for impact. New rules for Azure include detection for credential access. New Rules for Okta include detection for defense evasion. New Rules for Microsoft 365 include detection for initial access. Additionally, significant rule tuning for Windows , Linux and Microsoft 365 rules has been added for better rule efficacy and performance.
8.15.4	03 Sep 2024	10	5	This release includes new rules for Linux and AWS integration. New rules for Linux include detection for defense evasion and execution. New rules for AWS include detection for discovery, initial access, execution, and defense evasion. Additionally, significant rule tuning for Windows and MacOS rules has been added for better rule efficacy and performance.
8.15.3	21 Aug 2024	1	195	This release includes a new rule for Linux defense evasion detection. Additionally, significant rule tuning for Windows, Linux and AWS integration rules has been added for better rule efficacy and performance.
8.15.2	06 Aug 2024	7	44	This release includes new rules for Windows and AWS integration. New rules for Windows include detection for credential access and command and control. New rules for AWS include detection for execution, credential access, persistence and lateral movement. Additionally, significant rule tuning for Windows and Linux rules has been added for better rule efficacy and performance.
8.15.1	25 Jul 2024	14	72	This release includes new rules for Windows, Linux , and AWS integration. Deprecated rules include `Suspicious File Changes Activity Detected`. New rules for Windows include detection for lateral movement, credential access and defense evasion. New rules for Linux include detection for privilege escalation, execution, and persistence. New rules for AWS include detection for exfiltration, defense evasion and impact. Additionally, significant rule tuning for Windows, Linux, AWS, Google Workplace and Okta integration rules has been added for better rule efficacy and performance.

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