alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/CazinoSilver Checkin"; flow:established,to_server; http.uri; content:".php?key="; http.user_agent; bsize:4; content:"DMFR"; fast_pattern; http.header_names; content:!"|0d 0a|Accept"; content:!"|0d 0a|Referer|0d 0a|"; classtype:command-and-control; sid:2013511; rev:5; metadata:created_at 2011_08_31, malware_family Win32_CazinoSilver, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_05;)