alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET WEB_CLIENT Upatre Redirector Dec 16 2014 set"; flow:established,to_server; flowbits:set,Upatre.Redirector; flowbits:noalert; urilen:27; http.method; content:"GET"; http.uri; content:".html"; fast_pattern; pcre:"/^\/[a-z]{10}\/[a-z]{10}\.html$/"; http.header; content:!"|0d 0a|Referer|0d 0a|"; classtype:trojan-activity; sid:2019953; rev:4; metadata:created_at 2014_12_16, signature_severity Major, updated_at 2024_05_05;)