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99 lines
2.3 KiB
Markdown
99 lines
2.3 KiB
Markdown
# Clamav
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- [Clamav](#clamav)
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- [Quick Start](#quick-start)
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- [On Access Scanning](#on-access-scanning)
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- [Testing](#testing)
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## Quick Start
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<https://docs.clamav.net/manual/Usage/Configuration.html#first-time-set-up>
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```bash
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# Install
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sudo dnf install clamav clamav-freshclam clamd
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##### Set up Freshclam #####
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# Create freshclam's log file
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sudo touch /var/log/freshclam.log
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sudo chmod 600 /var/log/freshclam.log
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sudo chown clamscan /var/log/freshclam.log
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# Copy configuration files
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sudo cp active/software_clamav/freshclam.conf
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sudo chown root:root /etc/freshclam.conf
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sudo chmod u=rw,go=r /etc/freshclam.conf
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# Update the freshclam DB
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sudo freshclam
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sudo systemctl enable clamav-freshclam --now
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##### Set up Clamd #####
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# Create clamd's log file
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sudo touch /var/log/clamd.scan
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sudo chmod 600 /var/log/clamd.scan
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sudo chown clamscan /var/log/clamd.scan
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# Copy configuration files
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# NOTE: Edit scan.conf OnAccessIncludePath to point to your home dir
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vim active/software_clamav/scan.conf
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sudo cp active/software_clamav/scan.conf /etc/clamd.d/scan.conf
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sudo chown root:root /etc/clamd.d/scan.conf
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sudo chmod u=rw,go=r /etc/clamd.d/scan.conf
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# Allow clamav with selinux
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sudo setsebool -P antivirus_can_scan_system 1
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```
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Edit the `clamd@` service to limit system resources.
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```bash
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sudo systemctl edit clamd@
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[Service]
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Nice=18
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IOSchedulingClass=idle
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CPUSchedulingPolicy=idle
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```
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Then start the clamd service
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```bash
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sudo systemctl daemon-reload
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sudo systemctl enable --now clamd@scan
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sudo systemctl status clamd@scan
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```
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Allow your user to run scans
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```bash
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sudo -E usermod -aG virusgroup $USER
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```
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## On Access Scanning
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If you want to cripple your computer you can enable on-access scanning.
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```bash
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sudo systemctl edit clamav-clamonacc.service
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[Service]
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ExecStart=
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ExecStart=/usr/sbin/clamonacc -F --fdpass --config-file=/etc/clamd.d/scan.conf
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sudo systemctl daemon-reload
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sudo systemctl enable --now clamav-clamonacc.service
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```
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## Testing
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The `eicar` test malware allows you to test any malware scanner, as every
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scanner should have its signature included in its database.
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1. Create a new file called `eicar.com`
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2. Add the contents: `X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*`
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3. Save and scan: `clamdscan eicar.com`
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4. If you have on access scanning enabled you shouldn't be able to open it. |