ET HUNTING Hiloti Style GET to PHP with invalid terse MSIE headers

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET HUNTING Hiloti Style GET to PHP with invalid terse MSIE headers";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?";
    http.user_agent;
    content:"Mozilla/4.0|20|(compatible|3b 20|MSIE|20|";
    content:!"8"; within:1;
    content:"|3b 20|Windows|20|NT|20|"; distance:0;
    content:!"SlimBrowser";
    http.host;
    content:!".taobao.com";
    content:!".dict.cn";
    content:!".avg.com";
    content:!".weather.hao.360.cn";
    content:!"es.f.360.cn";
    http.header_names;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; depth:20; fast_pattern;
    classtype:bad-unknown;
    sid:2012612; rev:20;
    metadata:attack_target Client_Endpoint, created_at 2011_03_31, deployment Perimeter, performance_impact Significant, confidence Low, signature_severity Minor, updated_at 2024_04_09;
)