My processor does something odd every 30 min and I have no idea what or why...

[Ceetan]

My Little server was running smooth up untill about 2 weeks ago. At that point , it the processors started heating up every 30 min, causing the fans to speed up until it cooled again (working as intended) . It's been doing this ever since and I have no idea why.

It does not seem correlated with smarts or scrubs, I fear i may have malware. Any one have any idea on what to do about it or what could be causing it?

Fan Log with temps and such

 

[Ceetan]

Hardware for those that cannot see my sig
FreeNAS-9.10.2-U1 Stable
MOBO: Supermicro X11SSL-CF with
CPU: Intel Core i3-6100
RAM 2*16GB Crucial DDR4 ECC 2133MHz (CT2K16G4WFD8213)
8* WD Red WD40EFRX 64MB 4TB in RAIDZ2
BOOT: 90GB Corsair SSD
CASE: Fractal design node 804
PSU:EVGA SuperNOVA 650 G2
UPS: APC BE700G-GR
Fan Control: Hybrid CPU & HD Fan Zone Controller Script

 

[BigDave]

It's interesting that your first thought is an infection/virus?
Is your FreeNAS accessable outside your LAN? If this is true,
you will need to give a full accounting of how you have this
set up before anyone could help you with this.

 

[Stux]

Fan log shows CPU fan not going past medium. HDs get up to 37C and 80%. Which is expected.

What you do see is the CPU seems to be doing some work every 30 mins.

Run a top process with processes sorted by instan usage and view it when the fans kick up. Should tell you what is causing it.