ET MALWARE Sednit/APT28/Sofacy Delphocy CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Sednit/APT28/Sofacy Delphocy CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php";
    http.request_body;
    content:"as_q=";
    content:"as_ft="; fast_pattern;
    http.content_type;
    content:"application/x-www-form-urlencoded"; startswith;
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"Accept";
    reference:url,www.welivesecurity.com/post_paper/en-route-with-sednit-part-3-a-mysterious-downloader/;
    classtype:targeted-activity;
    sid:2023486; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_11_08, deployment Perimeter, malware_family APT28, malware_family Sofacy, malware_family Sednit_Delphocy, signature_severity Major, tag c2, updated_at 2020_10_07, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)