ET MALWARE Possible Evil Macro Downloading Trojan Dec 16 2015 Post to EXE

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Possible Evil Macro Downloading Trojan Dec 16 2015 Post to EXE";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".exe"; nocase; fast_pattern;
    pcre:"/^[\x2fa-z\d]+\.exe$/";
    http.header;
    content:"Content-Length|3a 20|0|0d 0a|Connection|3a 20|";
    content:"Accept|3a 20|*/*|0d 0a|"; depth:13;
    content:"Accept-Encoding|3a 20|gzip, deflate|0d 0a|User-Agent|3a 20|Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b|";
    http.header_names;
    content:!"Referer|0d 0a|";
    classtype:trojan-activity;
    sid:2022270; rev:5;
    metadata:created_at 2015_12_17, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_22;
)