Help diagnosing run away processes

[SimHat]

Last night at exactly 1:00am, my router looks like it just started spawning endless processes until it ate all the memory on the system and caused it to start doing some strange things and eventually crash. I've checked and there are no cron jobs that start at this time so I'm wondering is there an automatic cleanup process that possibly got stuck?

This is the second time this has happened in the last 2 weeks.  Both times it started exactly at 1:00am.  This only started with 24.7.5

Where would I even begin to look to see if I can find out what was spawning out of control?