ET MALWARE OpcJacker HVNC Variant Magic Packet

alert tcp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE OpcJacker HVNC Variant Magic Packet";
    dsize:<40;
    flow:established,to_server;
    content:"|25 56 0a dc c6 3b 55 39 80 13 9e 97|"; fast_pattern; startswith;
    content:"|06 07|"; distance:4; within:6;
    content:"7.7"; distance:8;
    reference:url,www.trendmicro.com/en_us/research/23/c/new-opcjacker-malware-distributed-via-fake-vpn-malvertising.html;
    classtype:trojan-activity;
    sid:2044843; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_30, deployment Perimeter, malware_family HVNC, performance_impact Low, confidence High, signature_severity Major, tag HVNC, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_30;
    target:src_ip;
)