ansible-role-clamav 🦪

Installs ClamAV and a related cron job. This allows servers to be quickly queried en mass for any matched signatures. The ClamAV-Report tool can be used to gather scan data from systems using this role.

Requirements

None.

Role Variables

Variable	Description	Default	Required
clamav_clamd_configuration	A dictionary of values to set in the clamd configuration file.	{}	No
clamav_configuration_backup	Whether or not to backup configuration files before changing.	false	No
clamav_cron_frequency	The frequency of ClamAV scanning. Must be custom or an ansible.builtin.cron special_time.	weekly	No
clamav_cron_custom	If frequency is set to custom, a dictionary to define the timer.	{"day": "*", "job": "/usr/local/share/virus_scan.sh", "minute": "30", "month": "*", "hour": "5", "weekday": "*"}	No
clamav_freshclam_configuration	A dictionary of values to set in the freshclam configuration file.	{}	No
clamav_scan_copy	Whether to copy infected files to quarantine folder.	false	No
clamav_scan_exclude_directories	A list of regexes matching directory trees that are to be excluded from scan operations.	[^/dev, ^/proc, ^/sys, ^/var/spool/clamav]	No
clamav_scan_extra_flags	Additional flags to pass to clamscan (see clamscan man page for reference).	[]	No
clamav_scan_move	Whether to move infected files to a quarantine directory.	false	No
clamav_scan_quarantine_directory	Directory to store infected files.	/var/spool/clamav	No
clamav_scan_quarantine_group	Group owner to apply to quarantine directory.	root	No
clamav_scan_quarantine_mode	Permissions to apply to quarantine directory.	0750	No
clamav_scan_quarantine_owner	Owner to apply to quarantine directory.	root	No
clamav_seboolean_name	The name of the SELinux boolean used to configure whether or not ClamAV is allowed to scan files. Note that this variable is only used when SELinux is enabled.	antivirus_can_scan_system	No
clamav_seboolean_state	The value to use for the SELinux boolean that configures whether or not ClamAV is allowed to scan files. Note that this variable is only used when SELinux is enabled.	true	No

Example

clamav_freshclam_configuration:
  DatabaseMirror: ['db.local.clamav.net', 'database.clamav.net']
  Bytecode: 'true'
  PrivateMirror:

would change:

  ...
  DatabaseMirror foo.bar.com
  DatabaseMirror bar.baz.com
  PrivateMirror private.mirror.local
  Bytecode false
  ...

to:

  ...
  DatabaseMirror db.local.clamav.net
  DatabaseMirror database.clamav.net
  Bytecode true
  ...

Dependencies

None.

Installation

This role can be installed via the command:

ansible-galaxy install --role-file path/to/requirements.yml

where requirements.yml looks like:

---
- name: clamav
  src: https://github.com/cisagov/ansible-role-clamav

and may contain other roles as well.

For more information about installing Ansible roles via a YAML file, please see the ansible-galaxy documentation.

Example Playbook

Here's how to use it in a playbook:

- hosts: all
  become: true
  become_method: sudo
  tasks:
    - name: Install ClamAV and a cron job to run automated AV scans
      ansible.builtin.include_role:
        name: clamav

Cron job output

The log of the last scan is accessible at: /var/log/clamav/lastscan.log

If a detection occurs the file /var/log/clamav/last_detection will be touched. Its modification time represents the time of the last detection.

Contributing

We welcome contributions! Please see CONTRIBUTING.md for details.

License

This project is in the worldwide public domain.

This project is in the public domain within the United States, and copyright and related rights in the work worldwide are waived through the CC0 1.0 Universal public domain dedication.

All contributions to this project will be released under the CC0 dedication. By submitting a pull request, you are agreeing to comply with this waiver of copyright interest.

Author Information

Mark Feldhousen, Jr. - mark.feldhousen@gwe.cisa.dhs.gov