ET MALWARE Nymaim.BA CnC M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Nymaim.BA CnC M1";
    flow:to_server,established;
    http.method;
    content:"POST";
    http.uri;
    content:!"/"; offset:1;
    content:!"|2e|";
    pcre:"/^\/[a-z0-9]+\?[a-z0-9]+(?:=[a-z0-9&=]+)?$/i";
    http.request_body;
    pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/";
    http.header;
    content:".in|0d 0a|User-Agent|3a 20|"; fast_pattern;
    content:"Cache-Control|3a 20|no-cache";
    content:"Pragma|3a 20|no-cache";
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    content:!"Content-Type|0d 0a|";
    reference:md5,3831e58cd22cc9bdf06f18f843cdfee9;
    reference:url,techhelplist.com/spam-list/974-intuit-browsers-update-malware;
    classtype:command-and-control;
    sid:2022119; rev:3;
    metadata:created_at 2015_11_19, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_09;
)