alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING Generic Hidden Text - Possible Phishing Landing"; flow:established,to_client; file.data; content:"<span style='font-size:0px|3b|'>"; content:"<span style='font-size:0px|3b|'>"; within:75; content:"<span style='font-size:0px|3b|'>"; within:75; content:"<span style='font-size:0px|3b|'>"; within:75; content:"<span style='font-size:0px|3b|'>"; within:75; content:"<span style='font-size:0px|3b|'>"; within:75; classtype:social-engineering; sid:2032510; rev:2; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2021_04_06, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2021_04_06, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)