ET WEB_CLIENT eval String.fromCharCode String Which May Be Malicious

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_CLIENT eval String.fromCharCode String Which May Be Malicious";
    flow:established,to_client;
    content:"eval|28|"; fast_pattern; nocase;
    content:"String.fromCharCode|28|"; nocase; within:40;
    pcre:"/eval\x28(String\x2EfromCharCode\x28|[a-z,0-9]{1,20}\x28String\x2EfromCharCode\x28)/i";
    classtype:bad-unknown;
    sid:2012173; rev:5;
    metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2011_01_12, deployment Perimeter, performance_impact Significant, signature_severity Major, tag Web_Client_Attacks, updated_at 2024_04_09;
)