sshbrute_external_internal

Explanation

This event is triggered by Netography's Fusion Portal when it detects an SSH brute force attack, which is an attempt to guess a valid password against an SSH server. This event specifically looks for activity from the Internet toward Internet facing SSH servers on your network.

What to Look For

Brute Force Attacks on SSH servers that are open to the Internet are quite commonplace, as many attackers scan the Internet for these endpoints. Ensure that strong passwords and/or multi-factor authentication are in use to prevent successful attacks. Check network logs for additional information and review endpoint security to ensure that sensitive information is secure.

Related MITRE ATT&CK Categories

Brute Force, Technique T1110 - Enterprise

External Remote Services, Technique T1133 - Enterprise