alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Downloader.Win32.Adload (KaiXin Payload) Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".ini?"; fast_pattern; pcre:"/^\/[a-z]+?\.*?ini\?\d+$/i"; http.header_names; to_lowercase; content:!"|0d 0a|accept-"; content:!"|0d 0a|user-agent|0d 0a|"; reference:md5,c45810710617f0149678cc1c6cbec7a6; classtype:command-and-control; sid:2021300; rev:5; metadata:created_at 2015_06_18, signature_severity Major, updated_at 2024_04_21;)