# Sagan squid.rules
# Copyright (c) 2009-2019. 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.
#
#*************************************************************
#
# In order for these rules to function with Squid,  you'll need:
# "access_log syslog" in your squid.conf .

alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SQUID] TCP_DENIED"; content: "TCP_DENIED"; default_proto: tcp; default_dst_port: $SQUID_PORT; classtype: suspicious-traffic; program: squid; reference: url,wiki.quadrantsec.com/bin/view/Main/5000043; sid: 5000043; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SQUID] TCP_DENIED unsupported-request-method"; content: "TCP_DENIED"; content: "unsupported-request-method"; default_proto: tcp; default_dst_port: $SQUID_PORT; classtype: suspicious-traffic; program: squid; reference: url,wiki.quadrantsec.com/bin/view/Main/5000044; sid: 5000044; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SQUID] TCP_DENIED invalid-request"; content: "TCP_DENIED"; content: "invalid-request"; default_proto: tcp; default_dst_port: $SQUID_PORT; classtype: suspicious-traffic; program: squid; reference: url,wiki.quadrantsec.com/bin/view/Main/5000045; sid: 5000045; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SQUID] @CGIDIRScgiwrap attempt"; content: "@CGIDIRScgiwrap"; default_proto: tcp; default_dst_port: $SQUID_PORT; classtype: web-application-activity; program: squid; reference: url,wiki.quadrantsec.com/bin/view/Main/5000046; sid: 5000046; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SQUID] Directory traversal attempt"; content: "../.."; default_proto: tcp; default_dst_port: $SQUID_PORT; classtype: web-application-attack; program: squid; reference: url,wiki.quadrantsec.com/bin/view/Main/5000047; sid: 5000047; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg: "[SQUID] XSS attempt"; content: "<script>"; nocase; content: "alert"; nocase; content: "document.cookie"; nocase; content: "</script>"; default_proto: tcp; default_dst_port: $SQUID_PORT; classtype: suspicious-traffic; program: squid; reference: url,wiki.quadrantsec.com/bin/view/Main/5000048; sid: 5000048; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SQUID] 'passwd' access attempt"; content: "passwd"; default_proto: tcp; default_dst_port: $SQUID_PORT; classtype: web-application-attack; program: squid; reference: url,wiki.quadrantsec.com/bin/view/Main/5000049; sid: 5000049; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SQUID] Directory traversal attempt"; content: "///"; default_proto: tcp; default_dst_port: $SQUID_PORT; classtype: web-application-attack; program: squid; reference: url,wiki.quadrantsec.com/bin/view/Main/5000050; sid: 5000050; rev:3;)
alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[SQUID] MSG Messenger access"; content: "x-msn-messenger"; default_proto: tcp; default_dst_port: $SQUID_PORT; classtype: policy-violation; program: squid; reference: url,wiki.quadrantsec.com/bin/view/Main/5000387; sid: 5000387; rev:3;)