alert tcp $EXTERNAL_NET any -> $SMTP_SERVERS 25 (msg:"ET DELETED Facebook Spam Inbound (2)"; flow:established,to_server; content:"Content-Disposition|3A| attachment|3b|"; nocase; content:"filename=|22|Facebook"; pcre:"/filename=\x22Facebook_(Password|Support|Document)_[A-Z0-9]{4,7}\.zip\x22/m"; classtype:trojan-activity; sid:2010498; rev:4; metadata:created_at 2010_07_30, signature_severity Unknown, updated_at 2019_07_26;)