alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible SKyWIper/Win32.Flame UA"; flow:established,to_server; http.user_agent; content:"Mozilla/4.0 (compatible|3b 20|MSIE 6.0|3b 20|Windows NT 5.1|3b 20|.NET CLR 1.1.2150)"; startswith; endswith; fast_pattern; reference:url,crysys.hu/skywiper/skywiper.pdf; classtype:trojan-activity; sid:2014818; rev:9; metadata:created_at 2012_05_29, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_13;)