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JS:Cryptonight (maybe) + "High CPU Usage detected"


mrviewerx
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I was loading a video into my PowerDirector when I had an Avast pop up "Saved you from JS:Cryptonight[Trb]". It popped up again and I rolled back to just the editor POP UP!.  I closed the editor POP UP! I closed everything but Chrome Home page POP UP! POP UP! POP UP!.   I closed out Chrome.  No pop up.  I re-opened Chrome and no pop up.  I scanned with MalwareBytes and found no virus.  Was this a case of the virus attempting to get into my system and was thwarted by Avast, or, is it a sign I have it and it escaped detection?  The end of JS:Cryptonight [Trb] might not be Trb - old memory problems.

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I have been getting small pop ups near the bottom of the page: "High CPU Usage Detected. Please click this notification so we can look at it".  The first time I opened Task manager and it showed Chrome running at 43% usage which seemed high and I clicked on it.  It has come back so many times [not clicking on it] I have finally wondered who "we" are.  Snip image attached.  Did I let something in?  [Again nothing showed on a MalwareBytes scan]

Dell Inspiron Win 10 64 bit  Chrome

 

Thanks,

 

 

who what.JPG

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  • Root Admin

Hello @mrviewerx

 

It may just be a javascript change to your browser. We'll scan for any other potential threats and if that's clean we'll try a couple other methods to clear the browsers.

Please run the following steps and post back the logs as an attachment when ready.

STEP 01

  • If you're already running Malwarebytes 3 then open Malwarebytes and check for updates. Then click on the Scan tab and select Threat Scan and click on Start Scan button.
  • If you don't have Malwarebytes 3 installed yet please download it from here and install it.
  • Once installed then open Malwarebytes and check for updates. Then click on the Scan tab and select Threat Scan and click on Start Scan button.
  • Once the scan is completed click on the Export Summary button and save the file as a Text file to your desktop or other location you can find, and attach that log on your next reply.
  • If Malwarebytes won't run then please skip to the next step and let me know on your next reply.

STEP 02

Please download AdwCleaner by Malwarebytes and save the file to your Desktop.

  • Right-click on the program and select RunAsAdmin.jpg Run as Administrator to start the tool.
  • Accept the Terms of use.
  • Wait until the database is updated.
  • Click Scan.
  • When finished, please click Clean.
  • Your PC should reboot now if any items were found.
  • After reboot, a log file will be opened. Copy its content into your next reply.

 

RESTART THE COMPUTER Before running Step 3

STEP 03
Please download the Farbar Recovery Scan Tool and save it to your desktop.

Note: You need to run the version compatible with your system. You can check here if you're not sure if your computer is 32-bit or 64-bit

  • Double-click to run it. When the tool opens, click Yes to disclaimer.
  • Press the Scan button.
  • It will make a log (FRST.txt) in the same directory the tool is run. Please attach it to your reply.
  • The first time the tool is run, it also makes another log (Addition.txt). If you've, run the tool before you need to place a check mark here.
  • Please attach the Additions.txt log to your reply as well.

 

Thanks

Ron

 

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  [Due to the years of my old PC]   I have MalwareBytes 3.3.1  I had Adware, but, needed to upgrade, and, had Farbar but needed to upgrade. [Upgrade brought out the 'addition'.  Where/how do I 'put a check mark here'? ]

 

Don't forget about thie popup with with "CPU Usage", please.  8-) 

 

 

MalwareBytes Log One.txt

MalwareBytes Log two-adware.txt

MalwareBytes log 3 -FRST.txt

MalwareBytes log 3 -FRST-Addition.txt

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So it is from my system and not some weird outside thing.   A Windows _helpful_, 'let us see how you are doing', thing?   Good.

  I have SpeedFan that I have used to check temps in the past.  [I "have" it - I save helpful apps .exes in a big folder]

Edited by mrviewerx
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5a8854188d03b_speedfan1.JPG.736ed49bb052569372e03a1ecc0f5e86.JPG This is with Chrome minimized.   I ran my PD8 Video editor and Usage went went up to 94% but the temps stayed stable.  HD0 may have gone up 1°.  I have a fan clamped to my desk and aimed at the intake fan.  I keep it running 24 hours a day.

Edited by mrviewerx
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  • Root Admin

When that dialog box is up, can you run Task Manager and determine which process is bringing it up?

You can also use Process Explorer to help try to track down what's bringing that dialog box up.

https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer

Give it a try and let me know what you find please.

Ron

 

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  • 3 weeks later...
  • Root Admin

Due to the lack of feedback, this topic is closed to prevent others from posting here.

If you need this topic reopened, please send a Private Message to any one of the moderating team members. Please include a link to this topic with your request.

This applies only to the originator of this topic. Other members who need assistance please start your own topic in a new thread.

Thanks

 

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