alert http $HTTP_SERVERS any -> $EXTERNAL_NET any (msg:"ET WEB_SERVER Generic Mailer Accessed on Internal Server"; flow:established,to_client; file.data; content:"SCRIPT MAILER INBOX"; content:">SMTP Login:</font></div>"; nocase; distance:0; fast_pattern; classtype:web-application-attack; sid:2030062; rev:2; metadata:affected_product Web_Server_Applications, attack_target Web_Server, created_at 2020_04_29, deployment Perimeter, confidence Medium, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_29;)