ET MALWARE [PTsecurity] MSIL/Biskvit.A Check-in

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE [PTsecurity] MSIL/Biskvit.A Check-in";
    flow:established,to_server;
    urilen:15;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/auth/token";
    http.header;
    content:"Authorization|3a 20 0d 0a|"; depth:18; fast_pattern;
    content:"Expect|3a 20|100-continue";
    http.request_body;
    content:"{|22|ApiKey|22 3a 22|"; depth:11;
    isdataat:!100,relative;
    http.connection;
    content:"Keep-Alive"; depth:10;
    http.content_type;
    content:"application/json"; depth:16;
    http.header_names;
    content:"|0d 0a|Authorization|0d 0a|"; depth:17;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    content:!"User-Agent|0d 0a|";
    reference:url,www.fortinet.com/blog/threat-research/russian-army-exhibition-decoy-leads-to-new-biskvit-malware.html;
    classtype:trojan-activity;
    sid:2026007; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_08_22, deployment Perimeter, malware_family MSIL_Biskvit_A, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_03;
)