ET MALWARE Outbound POST Request with Base64 ps PowerShell Command Output M3

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Outbound POST Request with Base64 ps PowerShell Command Output M3";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"IYW5kbGVzICBOUE0oSykgICAgUE0oSykgICAgICBXUyhLKSBWTShNKSAgIENQVSh"; fast_pattern;
    reference:url,attack.mitre.org/techniques/T1057/;
    reference:url,attack.mitre.org/techniques/T1086/;
    reference:url,attack.mitre.org/techniques/T1132/;
    classtype:trojan-activity;
    sid:2027213; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2019_04_16, confidence High, signature_severity Major, tag T1086, tag T1057, tag T1132, updated_at 2020_08_28;
)