alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Casbaneiro CnC Host Checkin M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?AT="; fast_pattern; content:"Microsoft Windows"; distance:0; content:"&MD="; distance:0; content:!"&"; distance:0; http_header_names; content:!"|0d 0a|Referer|0d 0a|"; reference:md5,6716f7a0e6f96617c9ba4b47ff9f41eb; classtype:trojan-activity; sid:2034292; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_10_29, deployment Perimeter, malware_family Casbaneiro, performance_impact Low, confidence High, signature_severity Major, tag Banker, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_29;)