┌─ minute          0
│ ┌─ hour          17
│ │ ┌─ day         *
│ │ │ ┌─ month     *
│ │ │ │ ┌─ weekday *
│ │ │ │ │
0 17 * * *

its in UTC+00, so

UTC cron time = UTC+7 desired time − 7 hours
00:00 − 07:00 = 17:00 UTC

17:00 UTC
+ 7 hours
----------
00:00 UTC+7