This detection rule identifies potential open redirect attacks where messages containing suspicious URLs related to Samsung are being sent from non-Samsung domains. The primary focus is on verifying the presence of URLs that redirect to Samsung-owned links from sources that shouldn't normally issue these redirects. Specifically, the rule checks for links ending in '/r/' from a Samsung subdomain or references to Google's or DoubleClick's domains within the query parameters. Notably, if such links are detected, but the email sender’s domain is not 'samsungusa.com' or 'samsung.com', an alert will be triggered, indicating possible credential phishing or other malicious intent. This type of analysis aids in reducing the attack surface by scrutinizing not only the content of the links but also the legitimacy of the email source.