ET MALWARE Steam Stealer

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Steam Stealer";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:"/uploads/images/201"; fast_pattern;
    pcre:"/\.png$/";
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"Accept";
    content:!"User-Agent|0d 0a|";
    reference:md5,5f50e810668942e8d694faeabab08260;
    reference:url,blog.0x3a.com/post/107195908164/analysis-of-steam-stealers-and-the-steam-stealer;
    classtype:trojan-activity;
    sid:2020095; rev:5;
    metadata:created_at 2015_01_06, signature_severity Major, updated_at 2020_09_29;
)