Rule History

alert dns $HOME_NET any -> any any (msg:"ET PHISHING Possible Protonmail Phishing Domain in DNS Query"; dns.query; content:"prtn.app"; nocase; endswith; reference:url,threatconnect.com/blog/building-out-protonmail-spoofed-infrastructure/; classtype:social-engineering; sid:2027779; rev:4; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2019_08_01, deployment Perimeter, confidence Medium, signature_severity Minor, updated_at 2020_09_17;)