alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Koobface HTTP Request (2)"; flow:established,to_server; http.uri; content:"?action="; nocase; content:"&v="; nocase; distance:0; pcre:"/\?action=\w+gen&v=\d/"; reference:url,ddanchev.blogspot.com/2009/09/koobface-botnets-scareware-business.html; classtype:trojan-activity; sid:2010150; rev:8; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_18;)