alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET PHISHING GhostFrame Phish Landing Page M2 2026-01-05"; flow:established,to_client; flowbits:isset,ET.GhostFramePhish; http.stat_code; content:"200"; http.response_body; content:"Send subdomain to parent iframe"; fast_pattern; content:"window.parent.postMessage"; distance:0; content:"window.location.href"; distance:0; content:"subdomain"; distance:0; reference:url,blog.barracuda.com/2025/12/04/threat-spotlight-ghostframe-phishing-kit; classtype:social-engineering; sid:2066594; rev:2; metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_01_06, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Phishing, tag Description_Generated_By_Proofpoint_Nexus, tag GhostFrame, updated_at 2026_01_12, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;)