alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE General Downloader Checkin URL (GUID+)"; flow:established,to_server; http.uri; content:"&version="; nocase; content:"&configversion="; nocase; content:"GUID="; nocase; content:"&cmd="; nocase; content:"&p="; nocase; content:"&i="; nocase; content:"&x="; nocase; classtype:command-and-control; sid:2007577; rev:7; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_21;)