alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY AmeriTechnology Group - CHARM Client"; flow:established,to_server; http.request_line; content:"GET /check.asp?co="; startswith; fast_pattern; http.uri; content:"&pc="; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; reference:md5,451f2852e35977a150066afdc5acb318; classtype:policy-violation; sid:2034118; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_10_05, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_05;)