ET MALWARE Malicious Powershell Activity (GET)

alert http $HOME_NET any -> $EXTERNAL_NET 1024: (
    msg:"ET MALWARE Malicious Powershell Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/jquery-3.3.1.slim.min.js"; bsize:25;
    http.referer;
    content:"http://code.jquery.com/"; bsize:23;
    reference:md5,f3100ed6ed9526289473ecd6af30061e;
    classtype:trojan-activity;
    sid:2047678; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_08_21, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_21, reviewed_at 2023_08_21;
    target:src_ip;
)