alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE StartPage jsp checkin"; flow:established,to_server; urilen:27<>40; http.method; content:"POST"; http.uri; content:"/201"; fast_pattern; content:".jsp"; pcre:"/^\/201\d{5,8}\/\d{6,11}\/\d{5,10}\.jsp$/"; http.user_agent; bsize:101; content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 5.2|3b 20|.NET CLR 1.1.4322|3b 20|.NET CLR 2.0.50727|3b 20|InfoPath.1)"; http.header_names; to_lowercase; content:!"|0d 0a|accept-language|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; threshold:type both,track by_src,count 2,seconds 60; reference:md5,bb7bbb0646e705ab036d73d920983256; classtype:command-and-control; sid:2017967; rev:8; metadata:created_at 2014_01_14, performance_impact Significant, signature_severity Major, updated_at 2024_04_30;)