The rule 'Crowdstrike Single IP Allowlisted' is designed to detect potentially malicious activity involving the allowlisting of IP addresses. It focuses specifically on scenarios where a single IP address (rather than a CIDR range) is allowlisted within a Crowdstrike environment, which can be indicative of unauthorized access or behavior by a potential threat actor. The rule analyzes logs generated during allowlist creation or updates and checks for occurrences where the allowlist contains one or more individual IP addresses. It employs a combination of event key-value pairs to assess the legitimacy of the allowlist action, ensuring that only authorized modifications are permitted. If an IP is found allowlisted without appropriate justification or deviates from expected patterns, an alert is generated, prompting further investigation. The rule is applicable across various integrated components of the Crowdstrike environment and gathers and modifies data about user and IP behavior in real-time, enhancing security posture against potential exploitation of allowlists.