alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Fullstuff Initial Checkin"; flow:established,to_server; http.uri; content:"/version.txt?type="; content:"&GUID="; content:"&rfr="; content:"&bgn="; http.user_agent; content:"FULLSTUFF"; startswith; classtype:command-and-control; sid:2013887; rev:6; metadata:created_at 2011_11_08, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_13;)