alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET PHISHING ODx /next.php Exfil Activity M3"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:9; content:"/next.php"; http.request_body; content:"do=check&email="; startswith; fast_pattern; reference:url,t7f4e9n3.delivery.rocketcdn.me/wp-content/uploads/2025/06/Sekoia_io___Global_analysis_of_Adversary_in_the_Middle_phishing_threats.pdf; reference:url,microsoft.com/en-us/security/blog/2023/06/08/detecting-and-mitigating-a-multi-stage-aitm-phishing-and-bec-campaign/; classtype:credential-theft; sid:2063539; rev:1; metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_07_16, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Phishing, tag ODx, tag Storm_1167, updated_at 2025_07_16, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)