alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO 404 Response with Javascript Variable in Page"; flow:established,to_client; http.response_line; content:"HTTP/1.1 404 Not Found"; file.data; content:"<script language=|22|Javascript|22|>var _skz_pid|20|=|20 22|"; fast_pattern; classtype:bad-unknown; sid:2039070; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_09_30, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_30;)