ET MALWARE Clipboard Monitor Data Exfiltration Attempt

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Clipboard Monitor Data Exfiltration Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    pcre:"/^\/[a-z]{5,10}\/[a-z]{5,10}$/";
    http.content_type;
    content:"application/json";
    http.header_names;
    content:"|0d 0a|content-type|0d 0a|accept|0d 0a|host|0d 0a|content-legnth|0d 0a 0d 0a|";
    content:!"|0d 0a|User-Agent|0d 0a|";
    content:!"|0d 0a|Referer|0d 0a|";
    http.request_body;
    content:"|7b 22|data|22 3a 22|"; startswith; fast_pattern;
    pcre:"/^[a-zA-Z0-9%+/=]{10}/R";
    reference:md5,545bb77b4d2ef3e5f6c29da6133dbdf3;
    classtype:trojan-activity;
    sid:2052932; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_05_28, deployment Perimeter, deployment SSLDecrypt, malware_family Clipboard_Monitor, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_28;
    target:src_ip;
)