ET MALWARE Windows Microsoft Windows DOS prompt command Error not recognized

alert tcp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Windows Microsoft Windows DOS prompt command Error not recognized";
    flow:established,to_server;
    content:"|27| is not recognized as an internal or external command|2c|";
    content:"operable program or batch file."; fast_pattern;
    classtype:trojan-activity;
    sid:2023207; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2016_09_15, deployment Perimeter, deployment Datacenter, performance_impact Low, confidence High, signature_severity Critical, updated_at 2019_07_26;
)