Rule Library

Sigma Rules

Browse detections by severity and log source, with YAML and sample events one click away.

3,782Total
3,164Detection
474Emerging
141Hunting
3 rulesInspect a rule without leaving your results.
lowtestEmerging Threat

Outlook Task/Note Reminder Received

Detects changes to the registry values related to outlook that indicates that a reminder was triggered for a Note or Task item. This could be a sign of exploitation of CVE-2023-23397. Further investigation is required to determine the success of an exploitation.

windowsregistry_set
2023-08-17
criticaltestEmerging Threat

CVE-2023-23397 Exploitation Attempt

Detects outlook initiating connection to a WebDAV or SMB share, which could be a sign of CVE-2023-23397 exploitation.

windowssecurity
2023-03-22
mediumtestEmerging Threat

Potential CVE-2023-23397 Exploitation Attempt - SMB

Detects (failed) outbound connection attempts to internet facing SMB servers. This could be a sign of potential exploitation attempts of CVE-2023-23397.

windowssmbclient-connectivity
2026-10-19