alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Qudox CnC Activity"; flow:established,to_server; http.start; content:"GET /gate.php HTTP/1.1|0d 0a|Host|3a 20|"; http.request_body; content:"0WmkD4"; startswith; fast_pattern; http.header_names; bsize:26; content:"|0d 0a|Host|0d 0a|Content-Length|0d 0a 0d 0a|"; threshold:type limit, track by_src, count 1, seconds 60; reference:md5,4806ceacf1f9ae4faddbace5201d36f0; classtype:command-and-control; sid:2030682; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_08_13, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_13;)