From 1904a6b194b3e5fc86228c9e3c3182358f03ae58 Mon Sep 17 00:00:00 2001
From: alhassco <alhass@exemple.com>
Date: Sun, 17 Sep 2023 21:03:32 +0200
Subject: [PATCH] TP AIDE et autres IDS

---
 sio2/CYBER/IDS/aide      |   8 ++
 sio2/CYBER/IDS/aide.conf | 189 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 197 insertions(+)
 create mode 100755 sio2/CYBER/IDS/aide
 create mode 100644 sio2/CYBER/IDS/aide.conf

diff --git a/sio2/CYBER/IDS/aide b/sio2/CYBER/IDS/aide
new file mode 100755
index 0000000..31eb8e5
--- /dev/null
+++ b/sio2/CYBER/IDS/aide
@@ -0,0 +1,8 @@
+#!/bin/bash
+aideinit  #initialisation
+/etc/cron.daily/aide  # on lance aide pour vérifier
+more /var/log/aide/aide.log  # on affiche le compte-rendu : pas de changements
+touch /etc/truc # on créée un fichier
+echo  "#########" >> /etc/hosts # on en modifie un autre
+/etc/cron.daily/aide  # on vérifie à nouveau
+more /var/log/aide/aide.log  # on constate les changements survenus ...
diff --git a/sio2/CYBER/IDS/aide.conf b/sio2/CYBER/IDS/aide.conf
new file mode 100644
index 0000000..e46c98f
--- /dev/null
+++ b/sio2/CYBER/IDS/aide.conf
@@ -0,0 +1,189 @@
+# AIDE conf
+
+# set environment for executable config files included by x_include
+@@x_include_setenv UPAC_settingsd /etc/aide/aide.settings.d
+
+# The daily cron job depends on these paths
+database_in=file:/var/lib/aide/aide.db
+database_out=file:/var/lib/aide/aide.db.new
+database_new=file:/var/lib/aide/aide.db.new
+gzip_dbout=yes
+
+# Set to no to disable report_summarize_changes option.
+report_summarize_changes=yes
+
+# Set to no to disable grouping of files in report.
+report_grouped=yes
+
+# Set verbosity of aide run and reports
+log_level=warning
+report_level=changed_attributes
+
+# Set to yes to print the checksums in the report in hex format
+report_base16 = no
+
+# if you want to sacrifice security for speed, remove some of these
+# checksums.
+Checksums = sha256+sha512+haval
+
+# The checksums of the databases to be printed in the report
+# Set to 'E' to disable.
+database_attrs = Checksums
+
+# check permissions, owner, group and file type
+OwnerMode = p+u+g+ftype
+
+# Check size and block count
+Size = s+b
+
+# Files that stay static
+InodeData = OwnerMode+n+i+Size+l+X
+StaticFile = m+c+Checksums
+
+# Files that stay static but are copied to a ram disk on startup
+# (causing different inode)
+RamdiskData = InodeData-i
+
+# Check everything
+Full = InodeData+StaticFile
+
+# Files that change their mtimes or ctimes but not their contents
+VarTime = InodeData+Checksums
+
+# Files that are recreated regularly but do not change their contents
+VarInode = VarTime-i
+
+# Files that change their contents during system operation
+VarFile = OwnerMode+n+l+X
+
+# Directories that change their contents during system operation
+VarDir = OwnerMode+n+i+X
+
+# Directories that are recreated regularly and change their contents
+VarDirInode = OwnerMode+n+X
+
+# Directories that change their mtimes or ctimes but not their contents
+VarDirTime = InodeData
+
+# Logs are special: they are continously written to, may be compressed
+# have their file name changed in different, mutually incompatibly ways
+# and apprear and vanish at will. Handling this is a a complex and error-
+# prone issue.
+#
+# This is best broken down in a number of small tasks:
+#
+#
+# (A)
+# While a live log is being written to, it doesn't change its mode and
+# inode and its size only increases.
+#
+# (B)
+# When a live log is rotated for the first time, it should not change
+# its mode, may change its inode, and its size decreases. The size
+# decrease may not be noticed by aide if the file had size x at the last
+# aide run, was rotated in the mean time and was written to so that it
+# had a size > x at the next aide run.
+#
+# (C)
+# When a log is compressed, this looks to aide like the uncompressed
+# file vanished (or was replaced by another file) and the compressed
+# file appeared out of the blue. There is (currently) no way to
+# associate the (gone) uncompressed file's contents with the (new)
+# compressed file's contents
+#
+# (D)
+# The actual log rotation may rename foo.{x}.bar to foo.{x+1}.bar without
+# changing the other properties of the file
+#
+# (E)
+# If only a given number of log generations is to be kept, foo.{y}.bar may
+# vanish, but usually only when no foo.{z}.bar exists for z>y.
+#
+# (F)
+# The set of files foo.{x}.bar to foo.{y}.bar is called a "log series"
+# in aide terms, with the lowest x being called the "LoSerMember" element
+# and the highest y being called the "HiSerMember" element, and the z
+# with x<z<y simple called "SerMember". The Lo and Hi members need to
+# be special cased in aide configuration.
+#
+#
+# This is an example of the normal life of a log named foo in a logrotate
+# configuration using a configuration at it is commonly used in Debian
+# (from old to new):
+#     1 logrotate deletes HiSerMember foo.{y}.gz
+#     2 logrotate rotates SerMember foo.{z-1}.gz to foo.{z}.gz for all
+#       z with 3<z<=y. This includes rotation of foo.{y-1}.gz to
+#       foo.{y}.gz and foo.2.gz to foo.3.gz
+#     3 logrotate compresses foo.1 to foo.2.gz, creating LoSerMember foo.2.gz
+#     4 logrotate rotates foo to foo.1 (a simple rename)
+#     5 logrotate creates new, empty foo
+#     6 foo daemon logs to foo - foo grows in size
+#
+# we need the following rules:
+# /var/log/foo$ f Log
+# /var/log/foo$ f FreqRotLog
+#    this takes care of the growing live log (step 7). The "Log" rule
+#    is appropriate for logs that are not rotated daily as rotation
+#    might be reported (if the file size has decreased since the last
+#    aide run). For daily rotated logs, the "FreqRotLog" may be more
+#    appropriate.
+# /var/log/foo\.1$ f LowLog
+#    this takes care of step 5.
+# /var/log/foo\.2\.gz$ f LoSerMemberLog
+#    this allows yet unknown new files to appear with a \.2\.gz extension,
+#    covering step 3.
+# /var/log/foo\.[3..y-1]\.gz$ f SerMemberLog
+#    this watches the log files as they wander through the Series,
+#    changing only their file name but not their contents or metadata,
+#    covering step 2.
+#    Please note that [3..y-1] needs to be a manually crafted regexp covering
+#    all numbers between 3 and y-1.
+# /var/log/foo\.y\.gz$ f HiSerMemberLog
+#    finally, the last element of the Series is allowed to vanish without
+#    being reported, covering step 1.
+#
+# Please note that these example rules need to be adapted to the logrotate
+# configuration for the log. Compression may be disabled or lead to a different
+# extension, the dateext option may be used, old logs might be held in a
+# different place, a log series does not necessarily need to be compressed etc.
+#
+# Please note that savelog rotates the live log to .0 and not to .1 as it
+# is logrotates (changeable) default.
+
+
+# Logs grow in size. Log rotation of these logs will be reported, so
+# this should only be used for logs that are not rotated daily.
+Log = OwnerMode+n+S+X
+
+# Logs that are frequently rotated
+FreqRotLog = Log-S
+
+# The first instance of a rotated log: After the log has stopped being
+# written to, but before rotation
+LowLog = Log-S
+
+# Rotated logs change their file name but retain all their other properties
+SerMemberLog  = Full+I
+
+# The first instance of a compressed, rotated log: After a LowLog was
+# compressed.
+LoSerMemberLog = SerMemberLog+ANF
+
+# The last instance of a compressed, rotated log: After this name, a log
+# will be removed
+HiSerMemberLog = SerMemberLog+ARF
+
+# Not-yet-compressed log created by logrotate's dateext option:
+# These files appear one rotation (renamed from the live log) and are gone
+# the next rotation (being compressed)
+LowDELog = SerMemberLog+ANF+ARF
+
+# Compressed log created by logrotate's dateext option: These files appear
+# once and are not touched any more.
+SerMemberDELog = Full+ANF
+
+# For daemons that log to a variable file name and have the live log
+# hardlinked to a static file name
+LinkedLog = Log-n
+
+@@x_include /etc/aide/aide.conf.d ^[a-zA-Z0-9_-]+$