alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Win32/Expiro.CD Check-in";
flow:established,to_server;
http.uri;
content:"/gate.php?user="; fast_pattern;
content:"&id="; nocase;
content:"&type=";
pcre:"/\.php\?user=[a-f0-9]{32}&id=\d+&type=\d+(?:$|&)/";
http.header_names;
content:!"User-Agent|0d 0a|";
reference:md5,c6e161a948f4474849d5740b2f27964a;
classtype:trojan-activity;
sid:2018255; rev:4;
metadata:created_at 2014_03_12, malware_family Win32_Expiro_CD, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_23;
)