alert tcp !152.0.0.0/16 any -> $SMTP_SERVERS 25 (msg:"ET DELETED UPS Spam Inbound"; flow:established,to_server; content:"ups.com"; nocase; fast_pattern; content:"Content-Disposition|3A| attachment|3b|"; nocase; content:"filename"; pcre:"/filename\s*?=[^\n]*?(UPS|United Parcel Service)[^\n]*?\.(rar|exe|zip)/im"; classtype:trojan-activity; sid:2010644; rev:16; metadata:created_at 2010_07_30, signature_severity Unknown, updated_at 2019_07_26;)