alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE WS/JS Downloader Mar 07 2017 M1"; flow:established,to_server; http.uri; content:"/counter/"; fast_pattern; pcre:"/\/counter\/(?:\?[a-z]?\d{1,2}$|[^\x2f]*\d\.exe$|.*?[?=](?=[A-Za-z_-]{0,200}[0-9][A-Za-z_-]{0,200}[0-9])(?=[A-Z0-9_-]{0,200}[a-z][A-Z0-9_-]{0,200}[a-z])(?=[a-z0-9_-]{0,200}[A-Z][a-z0-9_-]{0,200}[A-Z])[A-Za-z0-9_-]{50,}(?:&|$))/"; http.user_agent; content:"MSIE 7.0"; http.header_names; content:!"Referer"; content:!"Cookie"; classtype:trojan-activity; sid:2024035; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_03_08, deployment Perimeter, confidence High, signature_severity Major, updated_at 2020_08_18;)