alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Zemot Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/b/shoe/"; startswith; fast_pattern; pcre:"/^\d+?$/R"; http.user_agent; content:"Mozilla/4.0|20|"; startswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,e1cbdba0c57ddb5ab70aa1306dbacaa9; classtype:command-and-control; sid:2018643; rev:7; metadata:created_at 2014_02_28, malware_family Win32_Zemot, signature_severity Major, updated_at 2024_05_01;)