clamonacc for Ubuntu 18.04

clamd.conf

#/etc/clamav/clamd.conf
#Used with Virtualmin
#Tweak as needed

TCPSocket 3333
TCPAddr 127.0.0.1
User root
ScanMail true
ScanArchive true
ArchiveBlockEncrypted false
MaxDirectoryRecursion 15
FollowDirectorySymlinks false
FollowFileSymlinks false
ReadTimeout 180
MaxThreads 12
MaxConnectionQueueLength 15
LogSyslog false
LogRotate true
LogFacility LOG_LOCAL6
LogClean false
LogVerbose false
PreludeEnable no
PreludeAnalyzerName ClamAV
DatabaseDirectory /var/lib/clamav
OfficialDatabaseOnly false
SelfCheck 3600
Foreground false
Debug false
ScanPE true
MaxEmbeddedPE 10M
ScanOLE2 true
ScanPDF true
ScanHTML true
MaxHTMLNormalize 10M
MaxHTMLNoTags 2M
MaxScriptNormalize 5M
MaxZipTypeRcg 1M
ScanSWF true
ExitOnOOM false
LeaveTemporaryFiles false
AlgorithmicDetection true
ScanELF true
IdleTimeout 30
CrossFilesystems true
PhishingSignatures true
PhishingScanURLs true
PhishingAlwaysBlockSSLMismatch false
PhishingAlwaysBlockCloak false
PartitionIntersection false
DetectPUA false
ScanPartialMessages false
HeuristicScanPrecedence false
StructuredDataDetection false
CommandReadTimeout 30
SendBufTimeout 200
MaxQueue 100
ExtendedDetectionInfo true
OLE2BlockMacros false
AllowAllMatchScan true
ForceToDisk false
DisableCertCheck false
DisableCache false
MaxScanTime 120000
MaxScanSize 100M
MaxFileSize 25M
MaxRecursion 16
MaxFiles 10000
MaxPartitions 50
MaxIconsPE 100
PCREMatchLimit 10000
PCRERecMatchLimit 5000
PCREMaxFileSize 25M
ScanXMLDOCS true
ScanHWP3 true
MaxRecHWP3 16
StreamMaxLength 25M
LogFile /var/log/clamav/clamav.log
LogTime true
LogFileUnlock false
LogFileMaxSize 0
Bytecode true
BytecodeSecurity TrustSigned
BytecodeTimeout 60000
OnAccessMaxFileSize 5M
OnAccessMountPath /home
OnAccessIncludePath /home
OnAccessExcludeUname root
OnAccessPrevention true
OnAccessExtraScanning false
VirusEvent /etc/clamav/detected.sh
OnAccessExcludeRootUID yes
OnAccessRetryAttempts 3

clamonacc.service

# /etc/systemd/system/clamonacc.service
[Unit]
Description=ClamAV On Access Scanner
Requires=clamav-daemon.service
After=clamav-daemon.service syslog.target network.target

[Service]
Type=simple
User=root
ExecStart=/usr/bin/clamonacc -F --log=/var/log/clamav/clamonacc --move=/root/quarantine
Restart=on-failure
RestartSec=120s

[Install]
WantedBy=multi-user.target

detected.sh

#!/bin/bash
#/etc/clamav/detected.sh
#modify reply and to addresses

PATH=/usr/bin
alert="Signature detected: $CLAM_VIRUSEVENT_VIRUSNAME in $CLAM_VIRUSEVENT_FILENAME"

logtail="$(tail -n 50 /var/log/clamav/clamav.log | tac)"

# send email
export HOME=/root
/usr/bin/printf "Host: $HOSTNAME.\n$alert\n\ntail -n 50 /var/log/clamav/clamav.log\n\n\n$logtail" | /usr/bin/mailx -s "VIRUS ALERT - $HOSTNAME" -r REPLY@YOURDOMAIN.COM "ALERTS@YOURDOMNAIN.COM"

# Send the alert to systemd logger if exist, othewise to /var/log
if [[ -z $(command -v systemd-cat) ]]; then
        echo "$(date) - $alert" >> /var/log/clamav/detections.log
else
        echo "$alert" | /usr/bin/systemd-cat -t clamav -p emerg
fi