alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT VBScript Driveby MAR 31 2015"; flow:established,to_server; content:"/content/dl.php?sl=vbs"; http_uri; fast_pattern; pcre:"/\/content\/dl\.php\?sl=vbs[a-z0-9]{32}$/U"; classtype:exploit-kit; sid:2020823; rev:3; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2015_04_01, deployment Perimeter, signature_severity Major, tag DriveBy, updated_at 2019_10_08;)