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MBAM causing huge browser startup delays

Nelsonian
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Nelsonian

Nelsonian

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Latest (yesterday) MBAM Premium; Win10 Pro x64; Ryzen 8-core; Immunet AV

-->  Is this a known issue?  If not I can put together some diagnostics tonight and send them in.

MBAM is crippling browser startups.  This began about two days ago but I didn't investigate at first, suspecting temporary internet or website issues.

Chrome takes 3 min to get to the Google home page, compared to 3 sec with MBAM stopped.  Simply disabling Web Protection in MBAM doesn't help.  MS Edge is also significantly affected, though not to the same extent.

I have completely removed (via RevoUninstall), re-downloaded, and reinstalled MBAM with the same results.

 

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Porthos

Porthos

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6 minutes ago, Nelsonian said:

If not I can put together some diagnostics tonight and send them in.

Let's try and get some logs first so the team can review them and see if they can tell what may be causing your issues....

  1. FIRST: Create and obtain Farbar Recovery Scan Tool (FRST) logs
  2. Download FRST 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
  3. Double-click to run FRST and when the tool opens click "Yes" to the disclaimer
  4. Press the "Scan" button
  5. This will product two files in the same location (directory) as FRST: FRST.txt and Addition.txt
    NOTE: These two files will be collected by the MB-Check Tool and added to the zip file for you
  6. NEXT: Create and obtain an mb-check log
  7. Download MB-Check and save to your desktop
  8. Double-click to run MB-Check and within a few second the command window will open, then click "OK"
  9. This will produce one log file on your desktop: mb-check-results.zip
  10. Attach this file to your forum post by clicking on the "Drag files here to attach, or choose files..." or simply drag the file to the attachment area
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Nelsonian

Nelsonian

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Yeah, that's what I meant re diagnostics.

I'm assuming from your answer that this is not a known issue, so the time I spend doing these things will potentially be helpful.  It is surprising that, with a standard platform and millions of users, such a gross symptom hasn't raised lots of flags - if it really is due to MBAM...  My Windows installation is less than three weeks old with very few addons (Immunet; MBAM; Office; Thunderbird; Chrome).

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Nelsonian

Nelsonian

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Attached is the mb-check results file.  I manually added the Farbar logs since they had not been automatically found (maybe because I didn't run FRST from the desktop).

The problem is repeatable:  With MBAM3 enabled, Chrome takes one or two minutes to start and up to another minute to load the Google search page.  This does not change if I turn off MBAM web protection.  With MBAM3 off, Chrome starts and loads the Google site in 3-5 sec.  This is independent of whether or not I disable my Chrome security extensions (ScriptSafe, uBlock, Badger, Ghostery etc).  Disabling Windows firewall has no effect either.  Also, after running the Farbar scan, I updated Immunet to the new v6.06.  That had no effect either.

MS Edge startup is also being slowed, but not nearly as much; from a 3-sec time to about 10 sec.

mb-check-results.zip

Edited by Nelsonian
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Nelsonian

Nelsonian

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The delay due to Exploit Protection appears to be related to the number of Chrome extensions enabled*.

With Exploit Protection off, and all extensions enabled, Chrome loads in about 1 sec.

With EP on, and all extensions disabled, Chrome loads in about 4 sec.

With EP on, and and all extensions enabled, Chrome loads in about 30 sec.

The nine extensions are:  ScriptSafe; uBlock Origin; uBlock Origin Extra; Poper Blocker; Privacy Badger; Ghostery; DuckDuckGo; SaveAs MHTML; New Tab Redirect.

This is with the other MBAM3 protections (Web, Malware, Ransomware) turned on.

Win10 Pro x64 running under Standard User account, Ryzen CPU.

*[Or maybe to the characteristics of one or more of them; I'll experiment when I get more time.]

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Nelsonian

Nelsonian

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[THIS FORUM'S EDIT POLICY IS IDIOTIC.  IF YOU DON'T DO IT FAST ENOUGH, IT WILL DISCARD EVERYTHING YOU WROTE IN THE EDIT]

BELAY THE PREVIOUS POST - I DID TAKE MORE TIME...

The delay due to Exploit Protection appears to be somewhat related to the number of Chrome extensions enabled, but the results are pretty variable.  I get the feeling that the EP delay is most sensitive to whether or not ScriptSafe is one of those enabled, but the differences are too small to be sure.

With Exploit Protection off, and all extensions enabled, Chrome loads in about 1 sec.

With EP on, and all extensions disabled, Chrome loads in between 4 sec. and 30 sec.

With EP on, and and all extensions enabled, Chrome loads in about 30 sec.

After Chrome loads and brings up the Google main page, trying to open Chrome's Extensions Mgr can take 30 sec even with all extensions disabled

The nine extensions are:  ScriptSafe; uBlock Origin; uBlock Origin Extra; Poper Blocker; Privacy Badger; Ghostery; DuckDuckGo; SaveAs MHTML; New Tab Redirect.

This is with the other MBAM3 protections (Web, Malware, Ransomware) turned on.

Win10 Pro x64 running under Standard User account, Immunet AV, Ryzen CPU.

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Nelsonian

Nelsonian

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OK - after some thought I went ahead and uninstalled Immunet v6.0.6.  Unfortunately, that required a reboot, which brought in the newest MS Win10 update.  So until I reinstall Immunet I can't be sure which made the difference....

... but the good news is that even with Exploit Protection on, and all my extensions enabled, there is no more delay in opening or using Chrome.

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Nelsonian

Nelsonian

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Resolution:   Immunet v6.0.6.106 and MBAM3 Exploit Protection do not play well together on my PC.  If I uninstall Immunet, MBAM3 EP causes no Chrome loading or usage delays.  When I reinstall Immunet, the delays are back.  But Immunet by itself causes no problems with Chrome.

Still puzzling because I can't be the only person using these two products, even under a Standard User account.  But there it is.

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Nelsonian

Nelsonian

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You're right, and when I have more time I'll decide if I need anything more than uBlock Origin.

But, these extensions are not slowing my browser.  As I said, even with them all, Chrome loads in about 1 second.  I tried disabling them individually and in pairs etc.  That had little effect on the delays.

Far more significant is the apparent conflict between Immunet and MBAM3 Exploit Protection.

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Nelsonian

Nelsonian

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Solved.  The problem is that Immunet's "Blocking Mode" and MBAM3's "Exploit Protection" interfere with each other.  From other history, and the fact that Immunet's "Blocking Mode" is disabled by default, I guess it may be the more heavy-handed of the two features.  So I'll leave it disabled, and keep the "Exploit Protection".

[I wonder why this thread no longer appears in the Malwarebytes forum?  I was lucky to get back here via an old link.]

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