ET MALWARE BlackSanta CnC Activity (POST)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE BlackSanta CnC Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".aspx"; endswith;
    http.accept; bsize:1;
    content:"t";
    http.request_body;
    content:"dbseckey="; startswith; fast_pattern;
    content:"&action=";
    classtype:command-and-control;
    sid:2067848; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_02_19, deployment Perimeter, deployment SSLDecrypt, malware_family BlackSanta, confidence High, signature_severity Critical, updated_at 2026_02_19, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)