alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP Rogue.WinPCDefender Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?machine_id={"; startswith; fast_pattern; content:"}"; endswith; http.host; content:"anti"; startswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,aa8def27909596f8477a5374f735eec9; reference:url,www.bleepingcomputer.com/virus-removal/remove-antivirus-pro-2017; classtype:pup-activity; sid:2025358; rev:8; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_02_14, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_01;)