alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Iframe For IP Address Site"; flow:established,to_client; file_data; content:"iframe src=|22|http|3A|//"; nocase; distance:0; pcre:"/^\d{1,3}\x2E\d{1,3}\x2E\d{1,3}\x2E\d{1,3}[^\r\n]*\x3C\x2Fiframe\x3E/Ri"; classtype:bad-unknown; sid:2017342; rev:3; metadata:created_at 2013_08_19, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)