ET HUNTING SUSPICIOUS Firesale gTLD EXE DL with no Referer June 13 2016

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET HUNTING SUSPICIOUS Firesale gTLD EXE DL with no Referer June 13 2016";
    flow:established,to_server;
    http.uri;
    content:".exe"; nocase; fast_pattern;
    http.host;
    pcre:"/\.(?:s(?:(?:(?:cien|pa)c|it)e|tream)|c(?:l(?:ick|ub)|ountry|ricket)|m(?:(?:aiso|e)n|o(?:bi|m))|p(?:r(?:ess|o)|arty|ink|w)|r(?:e(?:[dn]|view)|acing)|w(?:eb(?:site|cam)|in)|b(?:(?:outiq|l)ue|id)|d(?:ownload|ate|esi)|(?:accountan|hos)t|l(?:o(?:an|l)|ink)|t(?:rade|ech|op)|v(?:oyage|ip)|g(?:dn|b)|online|faith|kim|xyz)(?:\x3a\d{1,5})?$/";
    http.header_names;
    content:!"Referer";
    content:!"Cookie";
    classtype:trojan-activity;
    sid:2022896; rev:7;
    metadata:created_at 2016_06_14, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_22, reviewed_at 2024_04_11;
)