alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP FormatFactory Install Checkin"; flow:established,to_server; http.request_line; content:"GET /ff/inst_stat?"; startswith; http.host; bsize:21; content:"server.pcfreetime.com"; reference:md5,3efa61c1ad1bc3a700563f54870676c3; classtype:pup-activity; sid:2030632; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_07_31, deployment Perimeter, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_31;)