alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET DELETED Generic Spambot Spam Download"; flow:established,to_server; content:"/synctl/getmail.fcgi?"; nocase; http_uri; content:!"User-Agent|3a|"; http_header; nocase; classtype:trojan-activity; sid:2002965; rev:7; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)