Malwarebytes causing powershell to take a long time to load

[modem7]

For some odd reason, lately malwarebytes is causing Powershell to take a long time to load. 

 

Not quite sure where to start in terms of resolving. 

With malwarebytes enabled:

Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.

Try the new cross-platform PowerShell https://aka.ms/pscore6

Loading personal and system profiles took 66352ms.

 

Without:

Message doesn't come up, but looks like around 400ms when running measure-script -Path $PROFILE

mbst-grab-results.zip

[Malwarebytes]

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[Ried]

Hello modem7.  We did have another person report this and Engineering is looking into this. 

By any chance if you turn off Malware & PUP protection, does powershell load right away?

[modem7]

1 minute ago, Ried said:

Hello modem7.  We did have another person report this and Engineering is looking into this. 

By any chance if you turn off Malware & PUP protection, does powershell load right away?

Heya,

 

Yes, that's exactly it. Once I disable the malware/pup, the powershell issue instantly gets resolved and the profile loads under 1 second.

[Ried]

Great, thanks!  This is what they are working on right now, I'll post in here when they believe they have it fixed.

I know the delay in powershell can be frustrating, but I encourage you to keep Malware & PUP protection on anyway.

[AdvancedSetup]

Can you please let us know exactly how you're loading PowerShell

Do you run a batch file, a shortcut?

Is your profile on another drive?

Can you share the exact code you're using to measure timing?

Thank you @modem7

 

[modem7]

18 minutes ago, AdvancedSetup said:

Can you please let us know exactly how you're loading PowerShell

Do you run a batch file, a shortcut?

Is your profile on another drive?

Can you share the exact code you're using to measure timing?

Thank you @modem7

 

Heya, 

 

Thankfully quite a simple setup (I only really use powershell to SSH into machines I don't normally SSH into).

Opening via Windows terminal which is pointing to: %SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe

Profile is on an NVME drive in my user directory:

PS C:\Users\Alex> $PROFILE
C:\Users\Alex\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1

I'm measuring speed via the command:

measure-script -Path $PROFILE

Which is available by installing PSProfiler (obvious how to do this, but gonna run through all the steps regardless):

Install-Module -Name PSProfiler

---

With PUP disabled:

PS C:\Users\Alex> measure-script -Path $PROFILE


    C:\Users\Alex\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1


      Count  Line       Time Taken Statement
      -----  ----       ---------- ---------
          1     1    00:00.0360372 ssh-manager completion powershell | out-string | invoke-expression
          0     2    00:00.0000000 # chocolatey profile
          1     3    00:00.0000624 $chocolateyprofile = "$env:chocolateyinstall\helpers\chocolateyprofile.psm1"
          0     4    00:00.0000000 if (test-path($chocolateyprofile)) {
          1     5    00:00.0001841   import-module "$chocolateyprofile"
          0     6    00:00.0000000 }
          0     7    00:00.0000000

 

[Ried]

We know this is an issue for some folks and it is actively being worked on. 

[Ried]

This issue has been fixed.  Open Malwarebytes and 'Check for Updates'

Please let me know if you still see an issue launching powershell

[modem7]

1 hour ago, Ried said:

This issue has been fixed.  Open Malwarebytes and 'Check for Updates'

Please let me know if you still see an issue launching powershell

That seems to be working as expected for me!

 

Thank you guys for your quick efforts!