ET MALWARE Cobalt Strike CnC Beacon (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Cobalt Strike CnC Beacon (POST)";
    flow:established,to_server;
    urilen:12;
    http.method;
    content:"POST";
    http.uri;
    content:"/mobile-home"; fast_pattern;
    http.accept;
    content:"|2a 2f 2a|";
    http.content_type;
    content:"text/plain"; bsize:10;
    http.cookie;
    content:"|5f 5f|session|5f 5f|id|3d|"; startswith;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    http.connection;
    content:"Close";
    http.header;
    content:"Cache-Control|3a 20|no-cache|0d 0a|";
    http.host;
    content:!"google.com";
    reference:url,thedfirreport.com/2023/05/22/icedid-macro-ends-in-nokoyawa-ransomware;
    classtype:trojan-activity;
    sid:2045857; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_05_24, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_24;
)