alert tcp any any -> $HOME_NET [25,587] (msg:"ET EXPLOIT Possible Postfix CVE-2014-6271 attempt"; flow:to_server,established; content:"|28 29 20 7b|"; fast_pattern; pcre:"/^[a-z-]+\s*?\x3a\s*?[^\r\n]*?\x28\x29\x20\x7b.*\x3b.*\x7d\s*\x3b(?!=[\r\n])/mi"; reference:url,exploit-db.com/exploits/34896/; reference:cve,2014-6271; classtype:attempted-admin; sid:2019389; rev:5; metadata:created_at 2014_10_10, cve CVE_2014_6271, confidence Medium, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;)