This detection rule is designed to identify suspicious logon events that may indicate a local privilege escalation attempt using a Kerberos relay attack. It focuses on events where the Logon Package is Kerberos, representing a potentially concerning scenario if the event occurs with a remote address of localhost (127.0.0.1) and if it is targeting the built-in local Administrator account, which is associated with a specific Security Identifier (SID). The essential details captured by the detection rule include the detection of Event ID 4624, indicating a successful logon attempt, with a particular emphasis on Logon Type 3 (network logon). The condition checks for logons made using Kerberos where the source IP is set to 127.0.0.1, and the Target User SID indicates the Administrator account (ending with '-500'). This pattern may reflect attempts to leverage Kerberos relay vulnerabilities, which can be exploited to elevate privileges from a standard domain user to local System privileges. Such activities are critical to detect, as they signify attempts to bypass security mechanisms and could lead to severe compromises if left unchecked.