ET MALWARE TontoTeam APT Related Bisonal CnC Activity

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE TontoTeam APT Related Bisonal CnC Activity";
    flow:established,to_server;
    content:"\\r\\nConnection|3a 20|keep-alive\\r\\nAccept"; fast_pattern;
    http.method;
    content:"GET";
    http.uri;
    content:"/index.php?strPageID=";
    http.header_names;
    content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:22;
    content:!"User-Agent";
    content:!"Accept";
    content:!"Referer";
    reference:md5,80987dcdb36e7cb52bb03f00261aa2bd;
    reference:url,www.sentinelone.com/labs/targets-of-interest-russian-organizations-increasingly-under-attack-by-chinese-apts/;
    classtype:trojan-activity;
    sid:2037722; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_07_02, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_08;
)