ET MALWARE Lost Door Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Lost Door Checkin";
    flow:established,to_server;
    http.method;
    content:"GET"; nocase;
    http.uri;
    content:"subject=Lost|20|door|20|"; fast_pattern;
    content:"by|20|OussamiO";
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Windows NT 5.1|3b 20|SV1)"; depth:55; nocase;
    classtype:command-and-control;
    sid:2008340; rev:12;
    metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_14;
)