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ftpd.rules
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ftpd.rules
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# Sagan ftpd.rules
# Copyright (c) 2009-2020. Quadrant Information Security <www.quadrantsec.com>
# All rights reserved.
#
# Please submit any custom rules or ideas to [email protected] or the sagan-sigs mailing list
#
#*************************************************************
# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
# following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this list of conditions and the following
# disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
# following disclaimer in the documentation and/or other materials provided with the distribution.
# * Neither the name of the nor the names of its contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#*************************************************************
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] FTP Login refused"; content: "FTP LOGIN REFUSED"; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: unsuccessful-user; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000182; sid:5000182; rev:6;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] File created"; content: " created "; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: not-suspicious; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000183; sid:5000183; rev:7;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] File deleted"; content: " deleted "; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: not-suspicious; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000184; sid:5000184; rev:6;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] User uploaded a file to server"; content: "IMPORT file"; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: not-suspicious; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000185; sid:5000185; rev:6;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] User downloaded a file to server"; content: "EXPORT file"; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: not-suspicious; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000186; sid:5000186; rev:6;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] Remote host connected to FTP server"; pcre: "/FTP LOGIN FROM|connection from|connect from/"; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: successful-user; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000187; sid:5000187; rev:6;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] Connection blocked by TCP Wrappers"; content: "refused connect from"; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: tcp-connection; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000188; sid:5000188; rev:6;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] Reverse lookup failure"; pcre: "/can't verify hostname|gethostbyaddr/"; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: not-suspicious; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000189; sid:5000189; rev:6;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] Multiple failed login attempts"; content: "repeated login failures"; xbits: set,brute_force, track ip_src, expire 21600; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: misc-attack; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000190; sid:5000190; rev:8;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] User disconnected due to time out"; content: "timed out after"; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: not-suspicious; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000191; sid:5000191; rev:6;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] Attempted access to a disabled account"; content: "Account is disabled"; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: unsuccessful-user; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5000192; sid:5000192; rev:6;)
#alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] Failed authentication"; content: "failed authentication from"; nocase; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: unsuccessful-user; program: ftpd|ftp|FTP|FTPD; reference: url,wiki.quadrantsec.com/bin/view/Main/5001522; sid:5001522; rev:6;)
drop any $EXTERNAL_NET any -> $HOME_NET any (msg:"[FTPD] Failed authentication - Brute force [5/5]"; content: "failed authentication from"; nocase; xbits: set,brute_force,track ip_src, expire 21600; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: unsuccessful-user; program: ftpd|ftp|FTP|FTPD; after: track by_src, count 5, seconds 300; threshold: type suppress, track by_src, count 1, seconds 300; reference: url,wiki.quadrantsec.com/bin/view/Main/5000193; sid:5000193; rev:12;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg: "[FTPD] User logged into an disabled account"; content: "FTP LOGIN FROM"; meta_content: " %sagan% ",apache,mysql,www,nobody,nogroup,portmap,named,rpc,mail,ftp,shutdown,halt,daemon,bin,postfix,shell,info,guest,psql,user,users,console,uucp,lp,sync,sshd,cdrom,ossec,sagan; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: successful-user; xbits: set,brute_force, track ip_src, expire 21600; reference: url,wiki.quadrantsec.com/bin/view/Main/5000412; program: ftpd|ftp|FTP|FTPD; sid: 5000412; rev:10;)
# Rule by W. E Restrepo ([email protected]) - 08/30/2016
alert any $EXTERNAL_NET any -> $HOME_NET any (msg: "[FTPD] FTPCHK3 file accessed by user"; content: "ftpchk3"; meta_content: "%sagan%",CHMOD,DELE,STOR"; parse_src_ip: 2; parse_dst_ip: 1; parse_port; program: ftp|ftpd|FTP|FTPD; default_proto: tcp; default_dst_port: $FTP_PORT: classtype: suspicious-traffic; reference: url,wiki.quadrantsec.com/bin/view/Main/5002950; reference: url,blog.ftptoday.com/ftp-password-stealing-malware; sid:5002950; rev: 5;)