alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Possible Fake 404 Credential Phish Landing Page"; flow:established,to_client; http.stat_code; content:"200"; http.response_header; header_lowercase; content:"x-powered-by|3a 20|PHP"; startswith; http.cookie; content:"PHPSESSID="; startswith; file.data; content:"<title>404 Not Found</title><p>The requested URL was not found on this server.</p>"; fast_pattern; reference:url,github.com/phish-report/IOK; classtype:credential-theft; sid:2038494; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_08_11, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_26;)