ET MALWARE MSIL/Almashreq CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE MSIL/Almashreq CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.user_agent;
    content:"MS|20|Web|20|Services|20|Client|20|Protocol"; fast_pattern;
    http.request_body;
    content:"<?xml"; depth:5;
    content:"<PCName>"; distance:0;
    content:"<|2f|PCName>"; distance:0;
    content:!"<SiteID>";
    http.header_names;
    content:"SOAPAction";
    content:!"Referer";
    classtype:command-and-control;
    sid:2027353; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_05_13, deployment Perimeter, malware_family MSIL_Almashreq, performance_impact Low, confidence High, signature_severity Major, tag Backdoor, updated_at 2020_10_21;
)