alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Votwup.Backdoor Checkin"; flow:established,to_server; content:"/ddos?uid="; http_uri; content:"&ver="; http_uri; reference:md5,1325e4e44b5bf2f8dfe550dec016da53; classtype:command-and-control; sid:2014760; rev:2; metadata:created_at 2012_05_17, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)