ET MALWARE Kuluoz/Asprox Activity

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Kuluoz/Asprox Activity";
    flow:established,to_server;
    flowbits:set,ET.Kuluoz;
    http.method;
    content:"POST";
    http.uri;
    pcre:"/^\/(?:[A-Fa-f0-9]+|index\.php)$/";
    http.header_names;
    content:!"Referer";
    http.request_body;
    content:"|80 00 00 00|"; depth:4;
    reference:md5,a3e0f51356d48124fba25485d1871b28;
    reference:url,www.trendmicro.com/cloud-content/us/pdfs/security-intelligence/white-papers/wp-asprox-reborn.pdf;
    reference:url,blog.fortinet.com/post/changes-in-the-asprox-botnet;
    classtype:trojan-activity;
    sid:2017895; rev:9;
    metadata:created_at 2013_12_24, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_08;
)