/etc/cron.daily/msktutil is in msktutil 0.5.1-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | #!/bin/sh
test -x /usr/sbin/msktutil || exit 0
# These options are overridden in /etc/default/msktutil.
# Edit there, not here.
AUTOUPDATE_ENABLED="false"
AUTOUPDATE_OPTIONS=""
[ -r /etc/default/msktutil ] && . /etc/default/msktutil
[ "$AUTOUPDATE_ENABLED" = "true" ] || exit 0
exec /usr/sbin/msktutil --auto-update $AUTOUPDATE_OPTIONS
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