alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Kriptovor Checkin";
flow:to_server,established;
http.method;
content:"POST"; nocase;
http.uri;
content:"/loader.php?name="; fast_pattern;
http.user_agent;
content:"Mozilla/5.0 (Windows|3b 20|U|3b 20|Windows NT 5.1|3b 20|en-US|3b 20|rv|3a|x.xx) Gecko/20030504 Mozilla Firebird/0.6"; depth:92;
http.header_names;
content:!"Referer|0d 0a|";
reference:url,fireeye.com/blog/threat-research/2015/04/analysis_of_kriptovo.html;
reference:md5,7e47a518561c46123d4facd43effafbf;
classtype:command-and-control;
sid:2020883; rev:7;
metadata:created_at 2015_04_09, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_30;
)