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bootc-images/images/fedora-intune/intune/defender-compliance.sh
Wesley van TilburgandClaude Opus 5.5 ca115922bd
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fedora-intune: query Defender through systemd-run instead of a snapshot
The health snapshot's temp directory, chmod and mv in /run every 5
minutes showed up in Defender's timeline as "Data Staged" and
"Executable permissions were added". Drop the snapshot service and
timer. The compliance script now runs `mdatp health` through
systemd-run, so systemd starts mdatp and Defender answers it even when
the script runs inside himmelblaud-tasks. Without systemd-run access it
asks mdatp directly, as before. No image support needed, so the script
works on other distros as is.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-10-20 14:12:59 +00:00

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#!/bin/bash
# Intune custom compliance discovery script for Linux: is Microsoft Defender
# for Endpoint (mdatp) installed, onboarded, licensed and protecting?
#
# Upload in Intune > Endpoint security > Device compliance > Scripts (Linux),
# and pair it with defender-compliance.json in a Linux compliance policy
# (Custom compliance). Himmelblau runs it as root inside
# himmelblaud-tasks.service and sends the JSON on stdout to Intune, which
# evaluates it against the rules. Every setting is always emitted, so a missing
# or stopped Defender reads as non-compliant instead of as a script error.
MDATP=/usr/bin/mdatp
# Defender won't answer `mdatp health` started from inside himmelblaud-tasks
# (it can't read that process while checking the caller), so ask through
# systemd, which runs mdatp as its own child. Elsewhere, ask mdatp directly.
health="$(systemd-run --quiet --wait --pipe --collect "${MDATP}" health 2>/dev/null)"
grep -q '^healthy' <<< "${health}" || health="$("${MDATP}" health 2>/dev/null)"
# Print one field of the `mdatp health` output ("name : value") without
# quotes or a trailing " [managed]".
field() {
grep -m1 "^$1 *:" <<< "${health}" \
| sed -e 's/^[^:]*: *//' -e 's/ \[managed\]$//' -e 's/^"//' -e 's/"$//'
}
bool() {
[[ "$1" == true ]] && echo true || echo false
}
installed=false
running=false
healthy=false
licensed=false
onboarded=false
rtp=false
behavior_monitoring=false
cloud_protection=false
definitions_ok=false
definitions_age=-1
version=""
if [[ -x "${MDATP}" ]]; then
installed=true
if [[ "$(field healthy)" =~ ^(true|false)$ ]]; then
# The daemon answered.
running=true
healthy="$(bool "$(field healthy)")"
licensed="$(bool "$(field licensed)")"
rtp="$(bool "$(field real_time_protection_enabled)")"
[[ "$(field behavior_monitoring)" == enabled ]] && behavior_monitoring=true
cloud_protection="$(bool "$(field cloud_enabled)")"
[[ -n "$(field org_id)" ]] && onboarded=true
[[ "$(field definitions_status)" == up_to_date ]] && definitions_ok=true
age="$(field definitions_updated_minutes_ago)"
[[ "${age}" =~ ^[0-9]+$ ]] && definitions_age=$(( age / 1440 ))
version="$(field app_version)"
version="${version//[^0-9A-Za-z._-]/}"
fi
fi
cat <<EOF
{
"DefenderInstalled": ${installed},
"DefenderRunning": ${running},
"DefenderHealthy": ${healthy},
"DefenderLicensed": ${licensed},
"DefenderOnboarded": ${onboarded},
"DefenderRealTimeProtection": ${rtp},
"DefenderBehaviorMonitoring": ${behavior_monitoring},
"DefenderCloudProtection": ${cloud_protection},
"DefenderDefinitionsUpToDate": ${definitions_ok},
"DefenderDefinitionsAgeDays": ${definitions_age},
"DefenderVersion": "${version}"
}
EOF