alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Fake Variation of Mozilla 4.0 - Likely Trojan"; flow:established,to_server; threshold:type limit, track by_src, count 1, seconds 60; http.user_agent; content:"Mozilla/4.0|20 28|compatible|3b 29|"; fast_pattern; endswith; http.header_names; content:!"BlueCoat"; nocase; http.host; content:!".bluecoat.com"; classtype:trojan-activity; sid:2014002; rev:12; metadata:created_at 2011_12_08, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_24;)