alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible Zeus P2P Variant Check-in"; flow:established,to_server; urilen:7; http.method; content:"POST"; http.uri; content:"/update"; fast_pattern; http.host; pcre:"/^[a-z0-9]+\.(?:biz|com|net|org)/"; http.header_names; to_lowercase; content:!"|0d 0a|user-agent|0d 0a|"; reference:url,blog.malcovery.com/blog/breaking-gameover-zeus-returns; reference:md5,5e5e46145409fb4a5c8a004217eef836; classtype:trojan-activity; sid:2018667; rev:6; metadata:created_at 2014_07_11, confidence Medium, signature_severity Major, updated_at 2024_04_20;)