alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE CrownAdPro CnC Activity M1";
flow:established,to_server;
http.uri;
content:"/ixset.php?ip="; startswith; fast_pattern;
content:"&mcid=1"; distance:0;
http.header_names;
content:"|0d 0a|Host|0d 0a|Accept|0d 0a 0d 0a|"; bsize:18;
reference:url,twitter.com/ViriBack/status/1204883534764077057;
reference:md5,514d11884ed88780710f5a84bbb523c7;
classtype:command-and-control;
sid:2029143; rev:2;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_12_12, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2019_12_12;
)