ET MALWARE Cobalt Strike Malleable C2 (Unknown Profile)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Cobalt Strike Malleable C2 (Unknown Profile)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/fam_newspaper"; startswith;
    http.accept;
    content:"image/*"; bsize:7;
    http.user_agent;
    content:"Mozilla/5.0 (Linux|3b 20|Android 8.0.0|3b 20|SM-G960F Build/R16NW) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202"; bsize:112;
    http.cookie;
    content:"wordpress_logged_in="; startswith;
    pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R";
    reference:md5,efb5212c17a7cd05e087ef7a5655b4aa;
    classtype:command-and-control;
    sid:2032956; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_05_13, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2021_05_13, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;
)