alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Common Downloader Install Report URL (farfly checkin)"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:"/rpt"; pcre:"/\/rpt\d/"; http.user_agent; content:!"Mozilla"; depth:7; http.host; content:!".apple.com"; endswith; content:!".pandora.com"; endswith; content:!"microsoft.com"; endswith; classtype:command-and-control; sid:2008233; rev:18; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16;)