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#####
#
# Copyright (C) 2002 Nicolas Delon <delon.nicolas@wanadoo.fr>
# All Rights Reserved
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING. If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
#
#####
#####
#
# Started on Thu Oct 17 12:01:59 2002
# Last update Fri Oct 25 23:32:44 2002
#
# Version 0.1
#
# Comment: tested with OpenSSH 3.5
#
#####
###################
# Logging succeed #
###################
regex=sshd.+: Accepted (\S+) for root from (\S+) port (\d+)\s*(ssh2)?; \
class.name=SSH Remote root logging; \
impact.severity=low; \
impact.completion=succeeded; \
impact.type=admin; \
impact.description=Root logged in from $2:$3 using the $1 method; \
source.node.address; \
source.node.address.category=ipv4-addr; \
source.node.address.address=$2; \
source.service.port=$3; \
source.service.protocol=tcp; \
# target.node.address.category=ipv46-addr; \
target.service.port=22; \
target.service.protocol=tcp; \
last;
regex=sshd.+: Accepted (\S+) for (?!root)(\S+) from (\S+) port (\d+)\s*(ssh2)?; \
class.name=SSH Remote user logging; \
impact.severity=low; \
impact.completion=succeeded; \
impact.type=user; \
impact.description=User $2 logged in from $3:$4 using the $1 method; \
source.node.address; \
source.node.address.category=ipv4-addr; \
source.node.address.address=$3; \
source.service.port=$4; \
source.service.protocol=tcp; \
# target.node.address.category=ipv46-addr; \
target.service.port=22; \
target.service.protocol=tcp;
################
# Login failed #
################
regex=sshd.+: Failed (\S+) for root from ([\d\.]+) port (\d+)\s*(ssh2)?; \
class.name=SSH Remote root logging failed; \
impact.severity=medium; \
impact.completion=failed; \
impact.type=admin; \
impact.description=Someone tried to login as root from $2:$3 using the $1 method; \
source.node.address; \
source.node.address.category=ipv4-addr; \
source.node.address.address=$2; \
source.service.port=$3; \
source.service.protocol=tcp; \
# target.node.address.category=ipv4-addr; \
target.service.port=22; \
target.service.protocol=tcp;
regex=sshd.+: Failed (\S+) for (?!root)(\S+) from ([\d\.]+) port (\d+)\s*(ssh2)?; \
class.name=SSH Remote user logging failed; \
impact.severity=medium; \
impact.completion=failed; \
impact.type=user; \
impact.description=Someone tried to login as $2 from $3:$4 using the $1 method; \
source.node.address; \
source.node.address.category=ipv4-addr; \
source.node.address.address=$3; \
source.service.port=$4; \
source.service.protocol=tcp; \
# target.node.address.category=ipv4-addr; \
target.service.port=22; \
target.service.protocol=tcp;
##############################################
# Invalid (not existing) user tried to login #
##############################################
regex=sshd.+: Illegal user (\S+) from (\S+); \
class.name=SSH Remote logging failed with an invalid user; \
impact.severity = medium; \
impact.completion=failed; \
impact.type=user; \
impact.description=Someone tried to login with the invalid user "$1" from $2; \
source.node.address; \
source.node.address.category=ipv4-addr; \
source.node.address.address=$2; \
target.service.port=22; \
target.service.protocol=tcp;
##################################################################################
# User listed in DenyGroups or DenyUsers (sshd_config directives) tried to login #
##################################################################################
regex=sshd.+: User (\S+) not allowed because .*listed in (\w+); \
class.name=SSH Remote logging failed with a denied user; \
impact.severity = medium; \
impact.completion=failed; \
impact.type=user; \
impact.description=User $1 failed to login because he is listed in $2; \
target.service.port=22; \
target.service.protocol=tcp;
##################################################################
# Sshd did not receive the identification string from the client #
# (maybe a ssh server recognition) #
##################################################################
regex=sshd.+: Did not receive identification string from (\S+); \
class.name=SSH Server recognition; \
impact.severity = medium; \
impact.completion=failed; \
impact.type=recon; \
impact.description=$1 making probably a server recognition; \
source.node.address; \
source.node.address.category=ipv4-addr; \
source.node.address.address=$1; \
source.service.protocol=tcp; \
target.service.port=22; \
target.service.protocol=tcp;
#########################################################################
# Forbidden root logging #
# (directive PermitRootLogin and keyword "no" or "forced-commands-only" #
# of the sshd_config file) #
#########################################################################
regex=sshd.+: ROOT LOGIN REFUSED FROM (\w+); \
class.name=SSH Remote root logging forbidden; \
impact.severity = medium; \
impact.completion=failed; \
impact.type=admin; \
impact.description=Root tried to login while it is forbidden; \
source.node.address; \
source.node.address.category=ipv4-addr; \
source.node.address.address=$1; \
source.service.protocol=tcp; \
target.service.port=22; \
target.service.protocol=tcp;
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