alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING Successful Excel Online Phish 2016-10-05"; flow:to_server,established; http.method; content:"POST"; http.uri; content:"excel"; nocase; content:".php"; nocase; endswith; http.request_body; content:"X1="; depth:3; nocase; content:"&X2="; nocase; distance:0; fast_pattern; classtype:credential-theft; sid:2032568; rev:7; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2016_10_05, deployment Perimeter, confidence Medium, signature_severity Critical, tag Phishing, updated_at 2022_03_24, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)