RKHunter : Install2023/07/21

	Install RKHunter which is the Rootkit Detection tool.
[1]	Install RKHunter.

root@dlp:~#

apt -y install rkhunter curl

[2]	Configure and Use RKHunter.

root@dlp:~#

vi /etc/default/rkhunter

# if set [yes], daily cron job will be run

CRON_DAILY_RUN=""

# set email address to receive report

REPORT_EMAIL="root"

root@dlp:~#

vi /etc/rkhunter.conf

# line 107 : change

UPDATE_MIRRORS=

# line 122 : change

MIRRORS_MODE=

# line 1190 : change to blank

WEB_CMD=""

# update database

root@dlp:~#

rkhunter --update

[ Rootkit Hunter version 1.4.6 ]

Checking rkhunter data files...
  Checking file mirrors.dat                                  [ Updated ]
  Checking file programs_bad.dat                             [ No update ]
  Checking file backdoorports.dat                            [ No update ]
  Checking file suspscan.dat                                 [ No update ]
  Checking file i18n/cn                                      [ Skipped ]
  Checking file i18n/de                                      [ Skipped ]
  Checking file i18n/en                                      [ No update ]
  Checking file i18n/tr                                      [ Skipped ]
  Checking file i18n/tr.utf8                                 [ Skipped ]
  Checking file i18n/zh                                      [ Skipped ]
  Checking file i18n/zh.utf8                                 [ Skipped ]
  Checking file i18n/ja                                      [ Skipped ]

# update system file properties

root@dlp:~#

rkhunter --propupd

[ Rootkit Hunter version 1.4.6 ]
File updated: searched for 180 files, found 141

# run checking
# [--sk] means skipping to push Enter key
# [--rwo] means display only warnings

root@dlp:~#

rkhunter --check --sk

[ Rootkit Hunter version 1.4.6 ]

Checking system commands...

  Performing 'strings' command checks
    Checking 'strings' command                               [ OK ]

  Performing 'shared libraries' checks
    Checking for preloading variables                        [ None found ]
    Checking for preloaded libraries                         [ None found ]
    Checking LD_LIBRARY_PATH variable                        [ Not found ]

  Performing file properties checks
    Checking for prerequisites                               [ OK ]
    /usr/sbin/adduser                                        [ OK ]
    /usr/sbin/chroot                                         [ OK ]
    /usr/sbin/cron                                           [ OK ]
    /usr/sbin/depmod                                         [ OK ]
    /usr/sbin/fsck                                           [ OK ]
    /usr/sbin/groupadd                                       [ OK ]

.....
.....

System checks summary
=====================

File properties checks...
    Files checked: 141
    Suspect files: 0

Rootkit checks...
    Rootkits checked : 495
    Possible rootkits: 0

Applications checks...
    All checks skipped

The system checks took: 1 minute and 2 seconds

All results have been written to the log file: /var/log/rkhunter.log

One or more warnings have been found while checking the system.
Please check the log file (/var/log/rkhunter.log)

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