alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING HTTP request for resource ending in .scr"; flow:established,to_server; http.uri; content:".scr"; endswith; fast_pattern; http.host; content:!"kaspersky.com"; classtype:misc-activity; sid:2018231; rev:7; metadata:attack_target Client_Endpoint, created_at 2014_03_07, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_15;)