Rule History

alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"ET DELETED SMTP US Secret IMCON"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(?<!TOP\s|T)(SECRET|S)//[\s\w,/-]*(IMCON|IMC)[\s\w,/-]*(?=//(X1|MR))/ism"; classtype:policy-violation; sid:2002433; rev:3; metadata:created_at 2010_07_30, signature_severity Unknown, updated_at 2019_07_26;)