This detection rule identifies potential brand impersonation attacks targeting SiriusXM, a popular broadcasting corporation. The criteria for triggering the rule include a match in the sender's display name or email domain resembling 'siriusxm', or slight variations of the brand name. It also checks if the root domain of the sender's email is not one of the legitimate domains associated with SiriusXM, which includes 'siriusxm.com' and its affiliates. If the domain is legitimate, the rule verifies the results of the DMARC authentication to ensure it has not passed, indicating a possible forgery. Additionally, the rule filters out solicited communications to focus on unsolicited messages that may be impersonating the brand. This rule addresses various attack types, mainly in the context of phishing and spam, leveraging content and header analysis techniques to detect malicious activities.