Identifies new UserAgents observed in the last 24 hours versus the previous 14 days. This detection extracts words from user agents to build the baseline and determine rareity rather than perform a direct comparison. This avoids FPs caused by version numbers and other high entropy user agent components. These new UserAgents could be benign. However, in normally stable environments, these new UserAgents could provide a starting point for investigating malicious activity. Note: W3CIISLog can be noisy depending on the environment, however OfficeActivity and AWSCloudTrail are usually stable with low numbers of detections.

0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.