ET MALWARE Generic Downloader Checkin - HTTP GET

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Generic Downloader Checkin - HTTP GET";
    flow:established,to_server;
    http.method;
    content:"GET"; nocase;
    http.uri;
    content:".php?"; nocase;
    content:"machineid="; nocase;
    content:"pubuserid="; nocase;
    content:"checkversion="; nocase;
    http.header_names;
    content:!"User-Agent|0d 0a|"; nocase;
    classtype:command-and-control;
    sid:2009527; rev:8;
    metadata:created_at 2010_07_30, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_21;
)