File: sendmail.rules

package info (click to toggle)
sagan-rules 1:20170725-1
  • links: PTS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 3,460 kB
  • sloc: makefile: 5
file content (45 lines) | stat: -rw-r--r-- 8,527 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
# Sagan sendmail.rules
# Copyright (c) 2009-2017, Quadrant Information Security <www.quadrantsec.com>
# All rights reserved.
#
# Please submit any custom rules or ideas to sagan-submit@quadrantsec.com 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.
#
#*************************************************************

drop any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] VRFY or EXPN root attempt"; content: " root"; nocase; pcre: "/vrfy|expn/i"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: attempted-recon; xbits: set, recon, 86400; program: sm-mta|sendmail; reference: url,wiki.quadrantsec.com/bin/view/Main/5000034; fwsam: src, 1 day; parse_src_ip: 1; reference:arachnids,31; reference:cve,1999-0531; reference:nessus,10249; sid: 5000034; rev:8;)
drop any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] EXPN command - rejected"; content:"expn "; nocase; content:"[rejected]"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: attempted-recon; xbits: set, recon, 86400; program: sm-mta|sendmail; reference: url,wiki.quadrantsec.com/bin/view/Main/5000035; parse_src_ip: 1; fwsam: src, 1 day; reference:arachnids,31; reference:cve,1999-0531; reference:nessus,10249; sid: 5000035; rev:8;)
drop any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] VRFY command - rejected"; content:"vrfy "; nocase; content:"[rejected]"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: attempted-recon; xbits: set, recon, 86400; program: sm-mta|sendmail; reference: url,wiki.quadrantsec.com/bin/view/Main/5000036;  parse_src_ip: 1; fwsam: src, 1 day; reference:arachnids,31; reference:cve,1999-0531; reference:nessus,10249; sid: 5000036; rev:8;)
drop any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] EXPN command - [not rejected]"; content:"expn "; content:!"rejected"; nocase; fwsam: src, 1 day; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: attempted-recon; xbits: set, recon, 86400; program: sm-mta|sendmail; reference: url,wiki.quadrantsec.com/bin/view/Main/5000035; parse_src_ip: 1; reference:arachnids,31; reference:cve,1999-0531; reference:nessus,10249; sid: 5000223; rev:9;)
drop any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] VRFY command - [not rejected]"; content:"vrfy "; content:!"rejected"; nocase; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: attempted-recon; xbits: set, recon, 86400; program: sm-mta|sendmail; reference: url,wiki.quadrantsec.com/bin/view/Main/5000036; parse_src_ip:1; fwsam: src, 1 day; reference:arachnids,31; reference:cve,1999-0531; reference:nessus,10249; sid: 5000224; rev:9;)
#drop any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] Relaying denied"; pcre: "/Relaying denied|reject=550 5.7.1/"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: suspicious-traffic;program: sm-mta|sendmail; parse_src_ip: 1; fwsam: src, 1 day; reference: url,wiki.quadrantsec.com/bin/view/Main/5000037; sid: 5000037; rev:9;)
#drop any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] Relaying denied [reject=550 5.7.1]"; content: "reject=550 5.7.1"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: suspicious-traffic;program: sm-mta|sendmail; parse_src_ip: 1; fwsam: src, 1 day; reference: url,wiki.quadrantsec.com/bin/view/Main/5000144; sid: 5000144; rev:6;)
#alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] Domain of sender does not resolve"; content:"reject=451 4.1.8"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: suspicious-traffic; program: sm-mta|sendmail; normalize; reference: url,wiki.quadrantsec.com/bin/view/Main/5000136; sid: 5000136; rev:5;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] Rejected by access list"; pcre: "/reject=550 5.0.0|reject=553 5.3.0/"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: suspicious-traffic; program: sm-mta|sendmail; reference: url,wiki.quadrantsec.com/bin/view/Main/5000137; sid: 5000137; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] Sender address does not have domain"; content:"reject=553 5.5.4 "; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: suspicious-traffic; program: sm-mta|sendmail; reference: url,wiki.quadrantsec.com/bin/view/Main/5000138; sid: 5000138; rev:2;)
#alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] Rejecting due to pre-greet"; content: "rejecting commands from"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: spam; program: sm-mta|sendmail; parse_src_ip: 1; reference: url,wiki.quadrantsec.com/bin/view/Main/5000139; sid: 5000139; rev:4;)
#alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] Save mail panic"; content: "savemail panic"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: program-error; program: sm-mta|sendmail; reference: url,wiki.quadrantsec.com/bin/view/Main/5000140; sid: 5000140; rev:3;)
#alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] Sendmail Spamassassin X-Spam-Score"; content: "X-Spam-Score"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: spam; program: sm-mta|sendmail; reference: url,wiki.quadrantsec.com/bin/view/Main/5000141; sid: 5000141; rev:3;)
#alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] Possible SMTP RCPT flood, throttling"; content: "Possible SMTP RCPT flood, throttling"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: spam; program: sm-mta|sendmail; parse_src_ip: 1; reference: url,wiki.quadrantsec.com/bin/view/Main/5000142; sid: 5000142; rev:4;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SENDMAIL] Username with pipe symbol"; content: "|7c|"; content: "to=<"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: exploit-attempt; program: sm-mta|sendmail; reference: url,wiki.quadrantsec.com/bin/view/Main/5000357; sid: 5000357; rev:4;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg: "[SENDMAIL] SpamAssassin Milter Plugin Remote Arbitrary Command Injection Attempt"; parse_src_ip: 1; program: sm-mta|sendmail; content: "/bin/"; content: "sh "; content: "|7c|"; content: "+"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: exploit-attempt; reference: url, wiki.quadrantsec.com/bin/view/Main/5000881; reference: url,http://www.securityfocus.com/bid/38578; sid: 5000881; rev:7;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg: "[SENDMAIL] Possible open proxy"; program: sm-mta|sendmail; content: "probable open proxy:"; parse_src_ip: 1; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: suspicious-traffic; xbits: set,recon, 86400; reference: url, wiki.quadrantsec.com/bin/view/Main/5001013; sid: 5001013; rev:7;)
#alert any $EXTERNAL_NET any -> $HOME_NET any (msg: "[SENDMAIL] Insufficient system resources [Remote] [0/5]"; program: sm-mta|sendmail; content: "Insufficient system resources"; default_proto: tcp; default_dst_port: $SMTP_PORT; classtype: program-error; threshold: type limit, track by_src, count 5, seconds 300; reference: url, wiki.quadrantsec.com/bin/view/Main/5001094; sid: 5001094; rev:5;)