alert http $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET WEB_CLIENT Likely Hostile Eval CRYPT.obfuscate Usage"; flow:established,to_client; content:"eval|28|CRYPT.obfuscate|28|"; nocase; fast_pattern; reference:url,research.zscaler.com/2010/05/malicious-hidden-iframes-using-publicly.html; classtype:bad-unknown; sid:2012404; rev:2; metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2011_03_01, deployment Perimeter, confidence Medium, signature_severity Major, tag Web_Client_Attacks, updated_at 2019_07_26;)