alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Malicious iframe"; flow:established,from_server; file_data; content:"<iframe"; pcre:"/^((?!<\/iframe>).)*?[\r\n\s]+name[\r\n\s]*=[\r\n\s]*(?P<q>[\x22\x27])?(Twitter|Google\+)(?P=q)?[\r\n\s]+/R"; content:"scrolling=auto frameborder=no align=center height=2 width=2"; within:59; fast_pattern; classtype:trojan-activity; sid:2016297; rev:5; metadata:created_at 2013_01_29, signature_severity Major, updated_at 2022_03_17, reviewed_at 2024_01_25;)