alert tcp any any -> $HOME_NET 21 (msg:"ET EXPLOIT Possible Pure-FTPd CVE-2014-6271 attempt"; flow:to_server,established; content:"|28 29 20 7b 20|"; fast_pattern; reference:url,gist.github.com/jedisct1/88c62ee34e6fa92c31dc; reference:cve,2014-6271; classtype:attempted-admin; sid:2019335; rev:2; metadata:created_at 2014_10_02, cve CVE_2014_6271, confidence Medium, signature_severity Major, tag CISA_KEV, updated_at 2019_10_08;)