The Cisco Umbrella Suspicious Domains detection rule is designed to monitor and flag suspicious or potentially malicious domains accessed within a network. This rule leverages DNS logging to capture domain queries and assess whether the accessed domains are considered problematic or known for malicious activity. By tracking the domain traffic and correlating it against known threat intelligence feeds, the rule can identify anomalous behavior indicative of possible compromise. Given its low severity rating, alerts generated by this rule are prioritized lower but still warrant investigation due to their potential implications for network security.