alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Unknown Trojan Dropped By Archie.EK"; flow:established,to_server; http.uri; content:".exe"; fast_pattern; pcre:"/^\/[56]\d{4}\x2c.*?\x2c[A-Z]\x3a[\x2f\x5c].+?\.exe/i"; http.header_names; to_lowercase; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; reference:md5,e6c91ab176887e5c79bb59277c651dfd; classtype:exploit-kit; sid:2018928; rev:6; metadata:created_at 2014_08_13, confidence Medium, signature_severity Major, updated_at 2024_04_27;)