alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Downloader.VB.CEJ HTTP Checkin"; flow:established,to_server; http.uri; content:"/down/?"; fast_pattern; content:"s="; content:"&t="; content:"&v="; pcre:"/\/down\d+\/down\/\?s=[A-F0-9]+\&t=\d+\/\d+\/20/"; classtype:command-and-control; sid:2008087; rev:6; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_16;)