splApache-2.0from splunk/security_content

Detect Excessive User Account Lockouts

The following analytic identifies user accounts experiencing an excessive number of lockouts within a short timeframe. It leverages the 'Change' data model, specifically focusing on events where the result indicates a lockout. This activity is significant as it may indicate a brute-force attack or misconfiguration, both of which require immediate attention. If confirmed malicious, this behavior could lead to account compromise, unauthorized access, and potential lateral movement within the network.

Quality

FP risk

—

Forks

Views

Rule sourcedetections/endpoint/detect_excessive_user_account_lockouts.yml

| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Change.All_Changes
  WHERE All_Changes.result="*lock*"
  BY All_Changes.user All_Changes.result
| `drop_dm_object_name("All_Changes")`
| `drop_dm_object_name("Account_Management")`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| search count > 5
| `detect_excessive_user_account_lockouts_filter`