alert dns any any -> $HOME_NET any (msg:"ET PHISHING Suspected Appspot Hosted Phishing Domain"; dns.query; content:!"www."; content:"-dot-"; content:".appspot.com"; fast_pattern; isdataat:!1,relative; pcre:"/^[a-z]{36,38}\-dot\-[a-z]+\-[a-z]+\-\d{6}\.[a-z]{2}\.[a-z]\.appspot\.com$/"; classtype:social-engineering; sid:2031149; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2020_10_30, deployment Perimeter, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_30;)