If a stolen Kerberos ticket is used across different computers within your network, what type of attack might you be dealing with?

The scenario of a stolen Kerberos ticket being used across different computers within a network directly relates to a pass-the-ticket attack. In such an attack, the primary risk is that an attacker, having obtained a valid Kerberos ticket, can authenticate themselves to various services and systems without needing to go through the typical authentication process.

This type of attack is particularly concerning because it demonstrates lateral movement within a network. Lateral movement refers to the techniques that attackers use once they’ve gained initial access to a network to expand their control and access other systems. By using the stolen ticket, the attacker effectively impersonates a legitimate user, bypassing various security controls that might be in place to prevent unauthorized access. This situation underscores the importance of monitoring for unusual authentication patterns and implementing measures such as ticket expiration, multi-factor authentication, and alerts for anomalous activities to prevent and detect such attacks.

While other attack types mentioned may involve credential compromise, they do not accurately fit the specific mechanics of using a Kerberos ticket across different networked systems. For instance, insider threats, ransomware, and phishing generally rely on different tactics and forms of access, not specifically on the misuse of a Kerberos ticket for lateral movement within a network.