AD domain with multiple failed authentication attempts from invalid users via NTLM

This condition is rated high severity because it indicates an attacker may be attempting to gather information for a targeted attack, potentially leading to unauthorized access or privilege escalation in the Active Directory environment. The repeated attempts provide valuable reconnaissance data, allowing attackers to refine their attacks and increase their chances of success.

Attackers can use collected data to plan a more targeted attack. They may attempt to create a valid username and password combination or exploit other vulnerabilities in the environment using the gathered information, ultimately leading to unauthorized access or privilege escalation.

Cayosoft Guardian continuously monitors Active Directory event logs for repeated, unsuccessful login attempts using the NTLM protocol. When this activity is detected, Guardian flags it as a security issue to prompt administrators to investigate and mitigate the threat.

Cayosoft Guardian provides real-time visibility into potential security threats, alerting administrators to take prompt action. This enables teams to quickly investigate and respond to suspicious activity, reducing the likelihood of successful attacks and minimizing the attacker's ability to persist in the environment.