The rule named "AWS DNS Crypto Domain" is designed to detect and flag potential instances of DNS queries directed at known cryptocurrency mining pool domains within AWS environments. This rule focuses specifically on monitoring DNS lookups to identify anomalous behavior that may indicate a machine is being used for unauthorized cryptocurrency mining activities. Through a series of tests, the rule distinguishes between legitimate DNS queries (non-crypto) and those that query domains associated with cryptocurrency mining. The expected outcome is to signal alerts when a DNS query matches known mining pool addresses, such as 'moneropool.ru', or its subdomains, thus protecting the infrastructure from misuse. The rule outputs findings based on several predefined criteria, and employs a logging mechanism for troubleshooting and audits, ensuring security teams can respond promptly to potential threats. Ultimately, the detection mechanism emphasizes the importance of observability within cloud environments when it comes to crypto-mining activities that could adversely affect resource availability and cloud costs.