/etc/prelude-lml/ruleset/proftpd.rules is in prelude-lml-rules 4.1.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | #FULLNAME: ProFTPD
#VERSION: 1.0
#DESCRIPTION: ProFTPD is an FTP server.
#####
#
# 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; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#####
#DESCRIPTION:Authentication failure
#CATEGORY:Authentication
#LOG:Jan 13 22:19:52 (none) proftpd[7804]: leroutier.net (193.249.231.232[193.249.231.232]) - PAM(leroutier): Authentication failure.
regex=[\w\-\.]+ \(([\d\.]+)\[[\d\.]+\]\) - PAM\(([\w\-\.]+)\): Authentication failure; \
classification.text=FTP login; \
id=1600; \
revision=2; \
analyzer(0).name=ProFTPD; \
analyzer(0).manufacturer=www.proftpd.org; \
analyzer(0).class=Service; \
assessment.impact.completion=failed; \
assessment.impact.type=user; \
assessment.impact.severity=medium; \
assessment.impact.description= Someone tried to login to your FTP server as user '$2' but failed; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$1; \
source(0).service.iana_protocol_name=tcp; \
source(0).service.iana_protocol_number=6; \
target(0).service.port=21; \
target(0).service.name=ftp; \
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=$2; \
last
#DESCRIPTION:No such user
#CATEGORY:Authentication
#LOG:Jan 13 22:19:58 (none) proftpd[7805]: leroutier.net (193.249.231.232[193.249.231.232]) - no such user 'uh'
regex=[\w\-\.]+ \(([\d\.]+)\[[\d\.]+\]\) - no such user '(\S+)'; \
classification.text=FTP login; \
id=1601; \
revision=2; \
analyzer(0).name=ProFTPD; \
analyzer(0).manufacturer=www.proftpd.org; \
analyzer(0).class=Service; \
assessment.impact.completion=failed; \
assessment.impact.type=user; \
assessment.impact.severity=medium; \
assessment.impact.description= Someone tried to login to your FTP server as a non-existant user '$2' but failed; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$1; \
source(0).service.iana_protocol_name=tcp; \
source(0).service.iana_protocol_number=6; \
target(0).service.port=21; \
target(0).service.name=ftp; \
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=$2; \
last
#DESCRIPTION:No such user found from @IP
#CATEGORY:Authentication
#LOG:Jan 13 22:39:03 (none) proftpd[8023]: leroutier.net (193.249.231.232[193.249.231.232]) - USER rr: no such user found from 193.249.231.232 [193.249.231.232] to 81.91.66.90:21
regex=[\w\-\.]+ \(([\d\.]+)\[[\d\.]+\]\) - USER (\S+): no such user found from [\w\-\.]+ \[[\w\-\.]+\] to ([\w\-\.]+):(\d+); \
classification.text=FTP login; \
id=1602; \
revision=2; \
analyzer(0).name=ProFTPD; \
analyzer(0).manufacturer=www.proftpd.org; \
analyzer(0).class=Service; \
assessment.impact.completion=failed; \
assessment.impact.type=user; \
assessment.impact.severity=medium; \
assessment.impact.description= Someone tried to login to your FTP server as a non-existant user '$2' but failed; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$1; \
source(0).service.iana_protocol_name=tcp; \
source(0).service.iana_protocol_number=6; \
target(0).node.address(0).category=ipv4-addr; \
target(0).node.address(0).address=$3; \
target(0).service.port=$4; \
target(0).service.name=ftp; \
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=$2; \
last
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