/etc/prelude-lml/ruleset/vpopmail.rules is in prelude-lml 1.0.0-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright (C) 2003 Stephane Loeuillet (stephane.loeuillet@tiscali.fr)
# All Rights Reserved
#
# This file is part of the Prelude-LML program.
#
# 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.
#
#####
#LOG:Jan 14 17:23:02 spotk vpopmail[28353]: vchkpw: vpopmail user not found toto@:127.0.0.1
#LOG:Feb 24 13:19:49 c vpopmail[9505]: vchkpw: vpopmail user not found temp@alexus.org:66.181.160.250
#LOG:Jan 14 17:30:13 spotk vpopmail[28425]: vchkpw: vpopmail user not found toto@:192.168.100.50
regex=vchkpw: vpopmail user not found (\S+):([\d\.]+); \
classification.text=Mail server unknown user; \
id=2100; \
revision=1; \
analyzer(0).name=vpopmail; \
analyzer(0).manufacturer=inter7; \
analyzer(0).class=Administration; \
assessment.impact.completion=failed; \
assessment.impact.type=user; \
assessment.impact.severity=medium; \
assessment.impact.description= Someone tried to log in to your POP3 server as a non-existant user '$1' but failed; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$2; \
source(0).service.iana_protocol_name=tcp; \
source(0).service.iana_protocol_number=6; \
target(0).service.port=110; \
target(0).service.name=pop3; \
target(0).service.iana_protocol_name=tcp; \
target(0).service.iana_protocol_number=6; \
target(0).user.user_id(0).type=target-user; \
target(0).user.user_id(0).name=$1; \
last
#LOG:Jan 14 17:24:54 spotk vpopmail[28359]: vchkpw: password fail xxx@spotk.net:127.0.0.1
regex=vchkpw: password fail (\S+):([\d\.]+); \
classification.text=Mail server user login; \
id=2101; \
revision=3; \
analyzer(0).name=vpopmail; \
analyzer(0).manufacturer=inter7; \
analyzer(0).class=Administration; \
assessment.impact.completion=failed; \
assessment.impact.type=user; \
assessment.impact.severity=medium; \
assessment.impact.description= Someone tried to log in to your POP3 server as user '$1' but failed; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$2; \
source(0).service.iana_protocol_name=tcp; \
source(0).service.iana_protocol_number=6; \
target(0).service.port=110; \
target(0).service.name=pop3; \
target(0).service.iana_protocol_name=tcp; \
target(0).service.iana_protocol_number=6; \
target(0).user.user_id(0).type=target-user; \
target(0).user.user_id(0).name=$1; \
last;
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