alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FakeAV.EGZ Checkin 2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/images/b.php?id="; fast_pattern; pcre:"/^\d{1,3}$/R"; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Windows NT 5.1|3b 20|SV1)"; classtype:command-and-control; sid:2013947; rev:6; metadata:created_at 2011_11_23, signature_severity Major, updated_at 2020_10_19;)