ET MALWARE Cobalt Strike Malleable C2 (Magnitude EK)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Cobalt Strike Malleable C2 (Magnitude EK)";
    flow:established,to_server;
    urilen:>235;
    http.request_line;
    content:"GET|20|/themes/index.php?id="; fast_pattern;
    http.uri;
    content:"/themes/index.php?id="; startswith;
    pcre:"/^[a-z]{200,}$/Rs";
    http.accept;
    content:"image/jpeg, application/*"; bsize:25;
    reference:url,github.com//rsmudge/Malleable-C2-Profiles/blob/master/crimeware/magnitude.profile;
    classtype:command-and-control;
    sid:2029741; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_03_26, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2020_03_26, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;
)