alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE iebar Spyware User Agent (iebar)"; flow:established,to_server; threshold:type limit, count 2, seconds 300, track by_src; http.header; content:"|3b 20|iebar"; fast_pattern; classtype:trojan-activity; sid:2007583; rev:12; metadata:created_at 2010_07_30, confidence High, signature_severity Major, updated_at 2020_09_17;)