alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Zlob User Agent - updating (unknown)"; flow:established,to_server; content:"User-Agent|3a| unknown"; http_header; content:!".real.com|0d 0a|"; http_header; content:!".rhapsody.com|0D 0A|"; http_header; classtype:trojan-activity; sid:2007567; rev:11; metadata:created_at 2010_07_30, signature_severity Unknown, updated_at 2019_07_26;)