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#!/usr/bin/env bash
#
##
# Linux Malware Detect v2.0.1
# (C) 2002-2026, R-fx Networks <proj@rfxn.com>
# (C) 2026, Ryan MacDonald <ryan@rfxn.com>
# This program may be freely redistributed under the terms of the GNU GPL v2
##
#
export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:$PATH
inspath='/usr/local/maldetect'
intcnf="$inspath/internals/internals.conf"
# prevent overlapping cron runs — use flock command form so the lock fd is
# CLOEXEC and never inherited by backgrounded maldet -b scans
LOCKFILE="$inspath/tmp/.cron.lock"
if command -v flock >/dev/null 2>&1 && [ -z "$_CRON_FLOCK" ]; then
export _CRON_FLOCK=1
flock -n "$LOCKFILE" "$0" "$@"
rc=$?
# flock -n exits 1 on lock contention; inner errors use exit 2
if [ "$rc" -eq 1 ]; then
exit 0
fi
exit "$rc"
fi
# Inner-script errors use exit 2 to distinguish from flock lock contention
# (exit 1). Do NOT use 'exit 1' for errors below the flock block.
if [ -f "$intcnf" ]; then
. $intcnf
else
echo "\$intcnf not found."
exit 2
fi
if [ -f "$cnf" ]; then
. $cnf
if [ -f "$compatcnf" ]; then
. $compatcnf
fi
else
echo "could not find \$cnf, fatal error, bye."
exit 2
fi
if [ -f "/etc/sysconfig/maldet" ]; then
. /etc/sysconfig/maldet
elif [ -f "/etc/default/maldet" ]; then
. /etc/default/maldet
fi
if [ -f "$cron_custom_conf" ]; then
. $cron_custom_conf
fi
if [ -z "$scan_days" ]; then
scan_days=1
fi
if [ -z "$cron_prune_days" ]; then
cron_prune_days=21
fi
if [ "$find" ]; then
# prune quarantine/session/tmp data older than $cron_prune_days days
tmpdirs="$tmpdir $varlibpath/sess $varlibpath/quarantine $varlibpath/pub"
for dir in $tmpdirs; do
if [ -d "$dir" ]; then
$find "$dir" -type f -mtime +${cron_prune_days} -delete 2>/dev/null
fi
done
fi
if [ "$autoupdate_version" == "1" ] || [ "$autoupdate_signatures" == "1" ]; then
# sleep for random 1-999s interval to better distribute upstream load
sleep $(echo $RANDOM | cut -c1-3) >> /dev/null 2>&1
fi
if [ "$autoupdate_version" == "1" ]; then
$inspath/maldet -d 1 2>&1 | tail -20 >> "$maldet_log"
if [ "${PIPESTATUS[0]}" -ne 0 ]; then
echo "$(date) cron.daily: maldet -d (version update) failed" >> "$maldet_log"
fi
fi
if [ "$autoupdate_signatures" == "1" ]; then
$inspath/maldet -u 1 2>&1 | tail -20 >> "$maldet_log"
if [ "${PIPESTATUS[0]}" -ne 0 ]; then
echo "$(date) cron.daily: maldet -u (signature update) failed" >> "$maldet_log"
fi
fi
# Maintenance: rotate oversized history files, clean stale scan metadata,
# compress/archive old sessions
$inspath/maldet --maintenance >> /dev/null 2>&1 # safe: maintenance output logged internally
# Hook scan digest — fire if hook.hits.log has content since last sweep
if [ "${cron_digest_hook:-1}" == "1" ] && [ -f "$sessdir/hook.hits.log" ] && [ -s "$sessdir/hook.hits.log" ]; then
echo "$(date) cron.daily: hook digest: checking for new detections" >> "$maldet_log"
$inspath/maldet --digest >> /dev/null 2>&1
fi
# if we're running inotify monitoring, send daily hit summary
if [ "$(ps -A --user root -o "cmd" | grep -E maldetect | grep -E inotifywait)" ]; then
$inspath/maldet --monitor-report >> /dev/null 2>&1
elif [ "$cron_daily_scan" == "1" ]; then
if [ -d "/home/virtual" ] && [ -d "/usr/lib/opcenter" ]; then
# ensim
$inspath/maldet -b -r /home/virtual/?/fst/var/www/html/,/home/virtual/?/fst/home/?/public_html/ $scan_days >> /dev/null 2>&1
elif [ -d "/etc/psa" ] && [ -d "/var/lib/psa" ]; then
# psa
$inspath/maldet -b -r /var/www/vhosts/?/ $scan_days >> /dev/null 2>&1
elif [ -d "/usr/local/directadmin" ]; then
# DirectAdmin
$inspath/maldet -b -r /home?/?/domains/?/public_html/,/var/www/html/?/ $scan_days >> /dev/null 2>&1
elif [ -d "/var/www/clients" ]; then
# ISPConfig
$inspath/maldet -b -r /var/www/clients/?/web?/web,/var/www/clients/?/web?/subdomains,/var/www $scan_days >> /dev/null 2>&1
elif [ -d "/etc/webmin/virtual-server" ]; then
# Virtualmin
$inspath/maldet -b -r /home/?/public_html/,/home/?/domains/?/public_html/ $scan_days >> /dev/null 2>&1
elif [ -d "/usr/local/ispmgr" ] || [ -d "/usr/local/mgr5" ]; then
# ISPmanager
$inspath/maldet -b -r /var/www/?/data/,/home/?/data/ $scan_days >> /dev/null 2>&1
elif [ -d "/var/customers/webs" ]; then
# froxlor
$inspath/maldet -b -r /var/customers/webs/ $scan_days >> /dev/null 2>&1
elif [ -d "/opt/webdir" ] && [ -d "/etc/nginx/bx" ]; then
# Bitrix
$inspath/maldet -b -r /home/bitrix/www/,/home/bitrix/ext_www/?/ $scan_days >> /dev/null 2>&1
elif [ -d "/usr/local/vesta" ] || [ -d "/usr/local/hestia" ]; then
# VestaCP or HestiaCP
$inspath/maldet -b -r /home/?/web/?/public_html/,/home/?/web/?/public_shtml/,/home/?/tmp/,/home/?/web/?/private/ $scan_days >> /dev/null 2>&1
elif [ -d "/usr/share/dtc" ]; then
# DTC
if [ -f /var/lib/dtc/saved_install_config ]; then
. /var/lib/dtc/saved_install_config
fi
$inspath/maldet -b -r ${conf_hosting_path:-/var/www/sites}/?/?/subdomains/?/html/ $scan_days >> /dev/null 2>&1
elif [ -d "/usr/local/cpanel" ] || [ -d "/var/cpanel" ]; then
# cPanel: parse /etc/userdatadomains for all document roots
# format: domain: user==owner==type==parent==/docroot==ip:port==
cpanel_paths="/home?/?/public_html/"
if [ -f /etc/userdatadomains ]; then
cpanel_extra=$(awk -F'==' '{gsub(/^[[:space:]]+|[[:space:]]+$/, "", $5); if ($5 != "" && $5 != "/") print $5}' /etc/userdatadomains | sort -u | while IFS= read -r docroot; do
# skip paths already covered by the public_html glob
case "$docroot" in
/home*/public_html|/home*/public_html/*) continue ;;
esac
[ -d "$docroot" ] && printf '%s/,' "$docroot"
done)
cpanel_extra="${cpanel_extra%,}"
if [ -n "$cpanel_extra" ]; then
cpanel_paths="${cpanel_paths},${cpanel_extra}"
fi
fi
$inspath/maldet -b -r ${cpanel_paths},/var/www/,/usr/local/apache/htdocs/ $scan_days >> /dev/null 2>&1
else
# interworx and other standard home/user/public_html setups
$inspath/maldet -b -r /home?/?/public_html/,/var/www/,/usr/local/apache/htdocs/ $scan_days >> /dev/null 2>&1
fi
fi
if [ -f "$cron_custom_exec" ]; then
. $cron_custom_exec
fi
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