ET MALWARE FakeAV FakeSmoke HTTP POST check-in

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE FakeAV FakeSmoke HTTP POST check-in";
    flow:established,to_server;
    http.method;
    content:"POST"; nocase;
    http.header_names;
    content:!"User-Agent|0d 0a|"; nocase;
    content:!"Referer|0d 0a|"; nocase;
    http.request_body;
    content:"current_version=";
    pcre:"/^[a-z0-9]{196}/Ri";
    reference:url,isc.sans.org/diary.html?storyid=7768;
    classtype:trojan-activity;
    sid:2010512; rev:10;
    metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_24;
)