alert ftp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT FTPShell client Stack Buffer Overflow"; flow:established,from_server; content:"220|20 22|"; isdataat:400,relative; content:!"|00|"; within:400; content:!"|22|"; within:400; content:!"|0b|"; within:400; content:!"|0a|"; within:400; content:!"|0d|"; within:400; content:"|ed 2e 45 22 20|"; fast_pattern; distance:400; reference:url,2018-8733; reference:cve,2018-8734; reference:cve,2018-8735; reference:cve,2018-7573; reference:url,exploit-db.com/exploits/44968/; classtype:attempted-user; sid:2025779; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_07_03, cve CVE_2018_8734, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2019_07_26;)