alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FBot Downloader Generic GET for ARM Payload"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/fbot.arm"; depth:9; fast_pattern; content:".u"; endswith; pcre:"/^\/fbot\.arm\d{1}\.u$/i"; http.protocol; content:"HTTP/1.0"; reference:url,blog.netlab.360.com/the-new-developments-of-the-fbot-en/; classtype:trojan-activity; sid:2026951; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_02_21, deployment Perimeter, malware_family Fbot, performance_impact Low, confidence Medium, signature_severity Major, tag Downloader, tag DDoS, updated_at 2020_09_16;)