alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Dotted Quad Host DOC Request"; flow:established,from_client; flowbits:isset,http.dottedquadhost; flowbits:set,http.dottedquadhost.doc; flowbits:unset,http.dottedquadhost; http.request_line; content:".doc HTTP/1."; nocase; fast_pattern; classtype:bad-unknown; sid:2027251; rev:5; metadata:attack_target Client_Endpoint, created_at 2019_04_23, deployment Perimeter, performance_impact Significant, confidence High, signature_severity Informational, updated_at 2022_11_21;)