alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Luder.B User-Agent (Mozilla/4.0 (SPGK)) - GET"; flow:established,to_server; http.method; content:"GET"; nocase; http.user_agent; content:"Mozilla/4.0 (SPGK)"; fast_pattern; nocase; bsize:18; reference:url,home.mcafee.com/VirusInfo/VirusProfile.aspx?key=212955#none; reference:url,www.threatexpert.com/threats/virus-win32-luder-b.html; classtype:trojan-activity; sid:2009805; rev:7; metadata:created_at 2010_07_30, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_13;)