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Malwarebytes took down my entire home network, and all my Windows servers today - be aware
Today suddenly all my home computers, servers and virtual machines stopped working - or they was up, but it was impossible to work on them. All the RAM was used, and one some the CPU was on 100%.
Had to hard reboot my servers, and not long after the reboot, they had the same issue again. Then saw that Malwarebytes Premium that I use on all my Windows clients and servers was the issue.
Had to disable the Malwarebytes service, then reboot and then thing was back to normal.
While I was working on my home network and machines, I started to get down alerts on my physical Windows servers around the world.
Had to do hard reboot on all of them, then RDC in, disable the Malwarebyte service, then reboot, and then all was back to normal there also...but it took time.
Malwarebyte forums is filled with this issue now - and here is the reason why it all happened:
Link to Malwarebyte forum and the thread from Malwarebyte
In short - they pushed an update that messed up on all devices after short time. The memory leak was 32 MB/s - so it filled the RAM pretty fast, then if you have caching on - it started to hammer on the disk, CPU and your machine was not responding.
They did come out with a fix after some hours, and now it's working fine again.
Had to reinstall on all servers, then reboot one more time, and then thing was OK.
Not how I had plan to spend my Saturday evening - had my homemade creamed potatoes in the oven when it happened, a 350g (12 oz) tenderloin beef rapped in bacon, balsamic marinaded mushroom and had opened a bottle of ch. mosse rivesaltes 1945 wine (yes 73 years old) - had to rush the dinner, but did enjoy some glasses of the wine 
Comments
@myhken
As usual you have a plan -especially for your saturday night this time– and surprise, guess what... Life has an other for you. Glad you get it resolved.
In my case malwarebytes wont open anymore since 2 days. A good reason to not renew on 12. february.
Same happened with my MB Ate all the RAM over 9 GB and system almost froze.
You will renew it as usual. Just swallow that need to troll and go with a mass. Malwarebytes is still good product for its price.
which is worse though ? not having malwarebytes and having malware infections foobar your systems ?
@eva2000 I was actual sure that my home network was hit by some crypto virus or something like that. So I cut my internet connection and my main switch.
But it was not long before I understood that the issue was malwarebytes, and at the same time I'm started to get down alerts on my offsite servers on my phone.
Most likely it would have been much harder to fix if it was an actual malware that hit me. Then, most likely I had to reinstall the OS to be sure.
Im glad i dont update malwarebytes on my laptop since 2017. That thing is dying from asking so much for an update. Im just too lazy to uninstall it.
filled up all my 16gb ram
While using commercial software having it licensed and keeping it up to date is important. The need of malware scanners is originating from either cracked software or not activated operating systems, afaib. Both are obstacles which won't let you keep your systems up to date.
Id rather have a virus than Malwarebytes on any of my systems
If I didn't have mwb lifetime license Id not renew it given the issues Ive had.
Use Kaspersky... its much better and never failed for me and my clients in last 10 years.
I'm quite happy with ESET Internet Security so far :P mwb takes care of the rest^^
My exact setup to any computer I need to remove any virus.
Lately I have prefered to reinstall windows as Im lazy to deal with corrupted files.
Do you also use the Multi Device License for Eset?
Free Trial. Never bought any antivirus license, never will. My desktop doesnt have any antivirus software, only rarely I install ESET and MWB to make a scan, and remove it afterwards.
I usually run everything that Im not familiar with under sandboxie to see if it doesnt drop any weird files.
I have used Malwarebytes for 8-10 years also, and this was the first time I had any issue with them. You never know when this will happen with any software out there.
So think I will stick with them for the future also, but maybe don't use it on a couple of my core servers, so if it happens again, my main systems is still up at least.
You seem to have nothing but problems with computers. Pick up a wrench.
This time it was actual my own system that went down, many of my threads here on LET is not about my own stuff, but not always I tell that in the threads
In fact my own webhosting that I sell to some customers has almost never had any real issues for several years. Not my mains servers with Hetzner, OVH and Kimsufi either, not before this Malwarebytes stuff.
But I'm working in the IT sector and gets lots of weird stuff coming my way there.
For what it's worth, MalwareBytes peaked at 2.x. 1.x was passable, 2.x was usable, and the latest? Although I have a lifetime license, I haven't even bothered to install it since the single Windows box does nothing but shoecoin RC5.
I think version 3 is good - beside this issue this weekend, I have never had any issue with them. I got a "shitload" of Lifetime licenses some years ago - that's the reason why I'm using it on all my Windows clients and servers. Actual a good AV program that you can run on server versions without having to get expensive server licenses.
When ver 3.2.2 got out, it's seems like they removed Windows Server from the supported OS, but in 3.3.1 it was OK to install it on servers again.
It's not an AV.
Version 3 is:
https://support.malwarebytes.com/docs/DOC-1147
and more
https://blog.malwarebytes.com/malwarebytes-news/2016/12/announcing-malwarebytes-3-0-a-next-generation-antivirus-replacement/
Actually several other antivirus software has starting to tell you that you have to choose between their AV or Malwarebytes. Etc Avast.
That's a rather broad statement. Rootkits, malware, et al. It can generally protect you better from web bugs than anything else, but until it stops some idiot from "installing a codec" to watch either porn or an illegal movie, it's likely still not on par, unless it interferes with all services being created/et al, like TeaTimer did back in the day.
Is really hard to get a malware infection nowadays if you use your system responsibly.
Tried to start lots of different files with different virus, like Ransomware, Trojan, Spyware and Malware and Malwarebytes 3.3.1 did stop every file from running in their realtime protection.
This was virus from webpages, e-mails and just .exe files extracted from .zip files on my desktop.
Well, if that's enough for you. It's certainly done more than Symantec ever has for the SOHO.
Finally Malwarebytes got it right! Windows is a virus!