Issues With Network Being Blocked.

[joe42353]

I have installed version 4.2.2 but I am still having issues with my network. I am using Windows 7 and 8 and 10 and I am having issues seeing and connecting to several computers. When I disable Malwarebytes it works fine. I have all versions of Windows from XP through 10. I reverted back to 4.1 and all is working fine. I just wanted you to be aware that this issue still exists, at least for me it it still an issue. I will be watching for the next update and test it out. I am having the most issues with the Windows 8 computer seeing windows 7 and XP computers on the network but is seems to be an issue for some degree on all the computers.

[joe42353]

I also want to add that this issue is with every computer that I install 4.2.2 on, not just one. Once I reverted back to 4.1 everything works great. This is not just an isolated issue on one system. I have turned off updates for now.

[joe42353]

Ran the Tool. Clean install on 2 machines. Same network issues on both. Using version 4.1.2 and no issues at all.

[exile360]

Greetings,

Thank you for reporting this issue.  It may prove helpful to provide diagnostic logs from one of the affected systems.  To do so, please do the following:

1. Download and run the Malwarebytes Support Tool
2. Accept the EULA and click Advanced tab on the left (not Start Repair)
3. Click the Gather Logs button, and once it completes, attach the zip file it creates on your desktop to your next reply
   

Thanks

[joe42353]

Here is that ZIP file you requested. Hope it helps. What I am finding is when I reboot the computer all the computers will show up at first. After the system is up for maybe 20 minutes or so, some of the computers will drop off but a couple might still be visible. i am finding this on Windows 7, 8 and 10. I use a mix of operating systems on different machines. At first, I thought it was my network. I  am a computer tech and I was about to pull my hair out. I have seen this with anti virus programs that have firewalls but i never in a million years would of expected Malwarebytes. Every computer when I disable Malwarebytes or go back to an older version works perfect again. Thanks for the help and I hope this all helps.

mbst-grab-results.zip

[joe42353]

I also need to add that one computer on my network is an old XP machine that I need for a weather program since I am a storm spotter. That one is always blocked when 4.2.2 is running. 

[Amun]

I'm using 4.2.1 and am seeing something similar - on a reboot I can sometimes see all my network devices, but within 10 minutes or so I seem to lose all network devices for browsing. They're still there, they still work (e.g. networked music system) but browsing the network only shows my laptop. If I disable Web Protection, it all works normally again.

Is there an ETA for a fix for this, please?

[Porthos]

18 minutes ago, Amun said:

I'm using 4.2.1 and am seeing something simila

A new build (4.2.2) has been released, so if you have not installed it already, please open Malwarebytes and check for updates and install it, then restart the system.

[Amun]

29 minutes ago, Porthos said:

A new build (4.2.2) has been released, so if you have not installed it already, please open Malwarebytes and check for updates and install it, then restart the system.

OK - but the OP is still reporting problems with 4.2.2 - I'll try it, though...

[joe42353]

13 minutes ago, Amun said:

OK - but the OP is still reporting problems with 4.2.2 - I'll try it, though...

I saw no difference with 4.2.2 even with a fresh install using the support tool. I had to go back to an earlier version to make it work properly.

[Amun]

49 minutes ago, joe42353 said:

I saw no difference with 4.2.2 even with a fresh install using the support tool. I had to go back to an earlier version to make it work properly.

Yes, I don't think that it will make any difference, either, but coming from a support background it's the first thing that I would have suggested 😀

[joe42353]

I should also note that the problem is even more severe on my Windows 8.1 machine.

[exile360]

Hey guys, it's a long shot, but please see if restoring Exploit Protection settings to their defaults helps at all.  To do so, open Malwarebytes and go to settings by clicking the small gear icon in the upper right, then select the Security tab and under the Exploit Protection section, make sure the option for blocking penetration testing attacks is set to off, then click the Advanced settings button under the same section and click the Restore Defaults button.  Once that is done, restart your system and test to see if the issue has been resolved.

Please let us know if that helps.

Thanks

[Amun]

2 hours ago, Amun said:

Yes, I don't think that it will make any difference, either, but coming from a support background it's the first thing that I would have suggested 😀

And it didn't make the slightest difference 😉

[Dave77]

5 hours ago, Amun said:

I'm using 4.2.1 and am seeing something similar - on a reboot I can sometimes see all my network devices, but within 10 minutes or so I seem to lose all network devices for browsing. They're still there, they still work (e.g. networked music system) but browsing the network only shows my laptop. If I disable Web Protection, it all works normally again.

Is there an ETA for a fix for this, please?

Using Version 4.2.2.95 Component package 1.0.1096

I have found that my NAS that is discovered by WSD is showing consistently in Windows Network.

My second (older) NAS and Raspberry Pi's that are discovered by NetBIOS initially show up, but disappear after a certain time (many minutes).  They can still be accessed, just not discovered in Windows Network.

Disabling  Web Protection immediately allows NetBIOS discovery computers to be seen.

It seems that the accidental block for Web Services for Devices (WSD) may have also affected NetBIOS discovery, the latest version has removed the accidental block for WSD but NetBIOS discovery is still affected.
 

[Amun]

2 hours ago, Dave77 said:

Using Version 4.2.2.95 Component package 1.0.1096

I have found that my NAS that is discovered by WSD is showing consistently in Windows Network.

My second (older) NAS and Raspberry Pi's that are discovered by NetBIOS initially show up, but disappear after a certain time (many minutes).  They can still be accessed, just not discovered in Windows Network.

Disabling  Web Protection immediately allows NetBIOS discovery computers to be seen.

It seems that the accidental block for Web Services for Devices (WSD) may have also affected NetBIOS discovery, the latest version has removed the accidental block for WSD but NetBIOS discovery is still affected.
 

Yes, it certainly seems that way.... I'm just leaving Web Protection off until Malwarebytes sort it out.

[Amun]

5 hours ago, exile360 said:

Hey guys, it's a long shot, but please see if restoring Exploit Protection settings to their defaults helps at all.  To do so, open Malwarebytes and go to settings by clicking the small gear icon in the upper right, then select the Security tab and under the Exploit Protection section, make sure the option for blocking penetration testing attacks is set to off, then click the Advanced settings button under the same section and click the Restore Defaults button.  Once that is done, restart your system and test to see if the issue has been resolved.

Please let us know if that helps.

Thanks

Tried it, but it made no difference.

[joe42353]

2 hours ago, Amun said:

Tried it, but it made no difference.

Made no difference for me either.

[joe42353]

5 hours ago, Dave77 said:

Using Version 4.2.2.95 Component package 1.0.1096

I have found that my NAS that is discovered by WSD is showing consistently in Windows Network.

My second (older) NAS and Raspberry Pi's that are discovered by NetBIOS initially show up, but disappear after a certain time (many minutes).  They can still be accessed, just not discovered in Windows Network.

Disabling  Web Protection immediately allows NetBIOS discovery computers to be seen.

It seems that the accidental block for Web Services for Devices (WSD) may have also affected NetBIOS discovery, the latest version has removed the accidental block for WSD but NetBIOS discovery is still affected.
 

Some of my computers cannot even be accessed. They just drop off the face of the earth.

[Hsjafo]

I've had the same problem nearly 2 weeks now. Had been getting help from Root Admin but the problem not solved. I'm not a tech type person like you guys. Will follow this in hopes MWB staff knows a problem exists and commit to solving it. It's caused me numerous head aches.

[Amun]

26 minutes ago, Hsjafo said:

I've had the same problem nearly 2 weeks now. Had been getting help from Root Admin but the problem not solved. I'm not a tech type person like you guys. Will follow this in hopes MWB staff knows a problem exists and commit to solving it. It's caused me numerous head aches.

Does turning Web Protection off not work for you? When I turn it off, Windows Defender takes up the slack, so I don't feel any more at risk.

[Hsjafo]

No its does not. Like others, only by shutting down MWB could I get to my NAS Buffalo Link to be seen.

[joe42353]

2 hours ago, Hsjafo said:

I've had the same problem nearly 2 weeks now. Had been getting help from Root Admin but the problem not solved. I'm not a tech type person like you guys. Will follow this in hopes MWB staff knows a problem exists and commit to solving it. It's caused me numerous head aches.

I agree. On some of my computers the only solution is to turn off Malwarebytes completly. I have actually done that on all my systems for now until I see this is resolved. I will not be renewing unless it is resolved soon.

[joe42353]

I am a computer tech and I have been getting calls from my customers about network issues. I have been removing Malwarebytes from their systems and that fixed every one. 

[AlexSmith]

On 10/31/2020 at 2:39 PM, Dave77 said:

Using Version 4.2.2.95 Component package 1.0.1096

I have found that my NAS that is discovered by WSD is showing consistently in Windows Network.

My second (older) NAS and Raspberry Pi's that are discovered by NetBIOS initially show up, but disappear after a certain time (many minutes).  They can still be accessed, just not discovered in Windows Network.

Disabling  Web Protection immediately allows NetBIOS discovery computers to be seen.

It seems that the accidental block for Web Services for Devices (WSD) may have also affected NetBIOS discovery, the latest version has removed the accidental block for WSD but NetBIOS discovery is still affected.
 

Thanks for the detailed information @Dave77. The remaining issue aligns with what we have uncovered as well. We are working on getting this fixed asap and apologize for the issues this has caused.

59 minutes ago, joe42353 said:

I am a computer tech and I have been getting calls from my customers about network issues. I have been removing Malwarebytes from their systems and that fixed every one. 

As I mention above, we are working on a fix for this. For the meantime, you can disable the Web Protection module temporarily.

Edited November 2, 2020 by AlexSmith