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;
)