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Kudos0

High CPU use malware

One of my machines has 90% CPU use. Its a windows 10 machine that hadn't been used fr 3 months so I was going through the update process including Norton.

Running task manager I saw that Cortana(?) was using 90% CPU.

Unable to run a scan in normal mode--seems Norton is disabled. Seems Acronis active protection is also off.  Suspect malware being used to mine crypto currency but can't find a way to remove.

Have done a complete scan in safe mode but nothing seen yet. Is it this? http://malware.wikia.com/wiki/Tiggre!rfn?

If so how do I use Norton to remove it and why wasn't it caught?

One update that might have hidden malware as Abode Flash player--I did allow it but got no warning.

Any ideas?

Replies

Kudos1 Stats

Re: High CPU use malware

If you got the latest windows update KB4512941 Build 18362.329 it is screwed.

I got Cortana at 34% CPU and so do a lot of others.

I uninstalled the KB4512941 update and back on 18362.295 and all is OK.

Jim 

Kudos0

Re: High CPU use malware

Not sure now that it's not crypto currency data mining---there are some other odd things happening that lead me to that. Norton wont run except in safe mode and Acronis active protection is turned off?? Unless that was done by the update it smacks of malware.  Either way I'll try to recover and reinstall the updates, take an image and then try KB4512941.  Going to be a long night

Kudos0

Re: High CPU use malware

If you are worried about the trojan in your link about, did you check for the file listed in that link?

It drops an executable called 'cherry.exe' to run in the background. It can be found under:

%Application Data%\{User name}\cherry.exe.
Things happen. Export/Backup your Norton Password Manager data.
Kudos0

Re: High CPU use malware

Cant find any malware described in the link.  Uninstalled the last "quality update" from microsoft--no idea what that was but system is now usable. Phew.

Thanks for all the comments

Kudos0

Re: High CPU use malware

Good news. Thanks for posting back.

Things happen. Export/Backup your Norton Password Manager data.

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