Comprehensive and Detailed Explanation:
* Understanding the Security Event:
* Administrator accounts are highly privileged and require strict monitoring.
* Server 4 shows failed login attempts for the administrator account. This could indicate a brute-force attack or unauthorized access attempt.
* The fact that none of the admin login attempts were successful suggests someone was trying to guess the credentials.
* Why Option D is Correct:
* Failed logins for administrator accounts are a critical security concern.
* If an attacker gains access, they could escalate privileges and compromise the network.
* Investigating unauthorized admin login attempts should be the top priority in a log audit.
* Why Other Options Are Incorrect:
* A (Endpoint not submitting logs): While this is concerning, it does not indicate an active attack
.
* B (Lateral movement): There's no evidence of a compromised account moving between servers yet.
* C (Misconfigured syslog server): False negatives are a possibility, but the failed admin logins are real.