ET MALWARE IP_LOGGER CnC Checkin (GET)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE IP_LOGGER CnC Checkin (GET)";
    flow:established,to_server;
    flowbits:set,ET.iplogger.checkin;
    urilen:<34;
    http.method;
    content:"GET";
    http.uri;
    content:"/ip_logger.php?"; startswith; fast_pattern;
    pcre:"/^((?:test\x3d1)|(?:ip=(?:\d{1,3}\x2e?){4}))$/R";
    http.header_names;
    content:!"|0d 0a|referer|0d 0a|"; nocase;
    content:!"|0d 0a|accept|0d 0a|"; nocase;
    reference:md5,c0d8b3bf6428b677f7d072aae79d937b;
    classtype:command-and-control;
    sid:2063139; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_06_23, deployment Perimeter, confidence High, signature_severity Critical, tag c2, updated_at 2025_06_23, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)