Classification:

attack

Tactic:

TA0006-credential-access

Technique:

T1110-brute-force

VIEW RULE IN DATADOG VIEW SIGNALS

Goal

Detect when multiple authentication attempts have failed, followed by one successful authentication.

Strategy

This rule monitors logs, and is triggered when there are multiple authentication failures followed by a successful authentication from the user. This could be indicative of a brute force attack against your system.

Triage and Response

1. Check the activity detected on the system {{@syslog.hostname}} by the user {{@usr.name}}.
2. Note the activity performed from {{@network.client.ip}}.
3. You can either block the user {{@usr.name}} from further accessing the system or contact your administrator to take further action.