alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Filez Downloader Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.content_type; bsize:33; content:"application/x-www-form-urlencoded"; http.request_body; content:"filez=%2f9j%2f4AAQSkZJRgAB"; startswith; nocase; fast_pattern; reference:md5,94cc739f30e69f6113a9bcd8d343a156; classtype:trojan-activity; sid:2042775; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_05_25, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_26, former_sid 2851692;)