ET POLICY Outgoing Basic Auth Base64 HTTP Password detected unencrypted

alert http $HOME_NET any -> any any (
    msg:"ET POLICY Outgoing Basic Auth Base64 HTTP Password detected unencrypted";
    flow:established,to_server;
    threshold:type both, count 1, seconds 300, track by_src;
    http.header;
    content:"Authorization|3a 20|Basic"; nocase;
    content:!"YW5vbnltb3VzOg=="; within:32;
    content:!"Proxy-Authorization|3a 20|Basic"; nocase;
    content:!"KG51bGwpOihudWxsKQ==";
    classtype:policy-violation;
    sid:2006380; rev:17;
    metadata:created_at 2010_07_30, performance_impact Significant, confidence Medium, signature_severity Informational, updated_at 2024_08_07;
)