ET RETIRED Troj_Yahoya Variant CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED Troj_Yahoya Variant CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/id|3f 3d|NT|28|Win"; fast_pattern; startswith;
    content:"x64|29 5f|AV|28|"; distance:0;
    content:"|29 7c 7c|QN|28|"; distance:0;
    content:"|29 7c 7c|WN|28|"; distance:0;
    content:"|29 7c 7c|HN|28|"; distance:0;
    content:"|29 7c 7c|MA|28|"; distance:0;
    content:"|29 7c 7c|WF|28|"; distance:0;
    content:"|29 7c 7c|VE|28|"; distance:0;
    http.header_names;
    content:!"User-Agent";
    content:!"Referer";
    reference:md5,7f8b4a962edea1dd9d552fbc907f76bb;
    reference:url,research.checkpoint.com/2022/chinese-actor-takes-aim-armed-with-nim-language-and-bizarro-aes/;
    classtype:targeted-activity;
    sid:2037233; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_06_30, deployment Perimeter, deployment SSLDecrypt, former_category MALWARE, malware_family Troj_Yahoya, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17, reviewed_at 2024_09_17;
)