alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Landing Page Executing Memory Defined Script Tag"; flow:established,to_client; http.stat_code; content:"200"; http.response_body; content:"<script>"; content:"document.head.append("; distance:0; content:"Object.assign("; distance:0; content:"document|2e|createElement|28 22|script|22 29|"; distance:0; fast_pattern; content:"</script>"; distance:0; classtype:bad-unknown; sid:2066788; rev:1; metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_01_15, deployment Perimeter, deployment SSLDecrypt, performance_impact Significant, confidence High, signature_severity Informational, updated_at 2026_01_15, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1036, mitre_technique_name Masquerading;)