alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Zbot/Zeus Dropper Infection - /check"; flow:established,to_server; content:"/check"; http_uri; content:"User-Agent|3a| Microsoft Internet Explorer|0d 0a|"; http_header; content:"Cache-Control|3a| no-cache|0d 0a|"; http_header; classtype:trojan-activity; sid:2009212; rev:5; metadata:created_at 2010_07_30, signature_severity Unknown, updated_at 2019_07_26;)