alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32.FakeAV.Rean Checkin"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; pcre:"/\/\d{10}$/"; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Windows NT 5.1)"; fast_pattern; endswith; http.protocol; content:"HTTP/1.0"; reference:md5,0a998a070beb287524f9be6dd650c959; classtype:command-and-control; sid:2013339; rev:8; metadata:created_at 2011_08_02, signature_severity Major, updated_at 2020_09_14;)