Malwarebytes flags Windows as a trojan horse, bricks thousands of PCs by accident

Malwarebytes

By on April 22, 2013 at 8:17 am

Anti-virus software Malwarebytes caused a bit of a stir late last week when it falsely flagged core Windows system files as malicious, trojan horse-downloading exploits. The software promptly disabled the files and thus the computer, causing either unstable or non-functional systems across thousands of commercial and home users.

CEO Marcin Kleczynski has apologised for the mistake in an announcement, as well as issuing a tool that affected users can use to restore their systems to functionality. You can find that here.

Malwarebytes have promised that in the future all releases will be much more thoroughly tested, including on a virtual server, to make sure this doesn’t happen again.

Source: The Register (thanks, Damien)

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19 comments (Leave your own)

Woah, I wondered what was happening. A customer came in last week with a computer that he’d scanned with MWB and the system was no longer bootable. Had me scratching my head as I’ve used it a lot with no issues…now I know the customer isn’t at fault…

 

Well, that’s not gone well.

 

Good to know they’ll do testing in future.. just… just… how the hell do you have to learn that as a lesson?

 

now I am too scared to run my scan this week, I have not done so for a few weeks. I paid for malwarebytes too so dammed if I wanna brick my PC.

 

Sounds about right…

 

tas:
now I am too scared to run my scan this week, I have not done so for a few weeks. I paid for malwarebytes too so dammed if I wanna brick my PC.

Just grab the latest version. It’s been fixed up.

 

Shame – their software really is pretty great. Apart from the whole deleting Windows issue.

 

I ran a scan last week and it detected nothing on Windows 7.

Which Windows is the article referring to?

 

Tim Colwill,

ahh magic, thanks mate

 

caitsith01: his week, I have not done so for a few weeks. I paid for malwarebytes too so

Could be worse, I cant remember the name but the was an RPG released at some stage (D&D based IIRC) that would randomly format/brick your hardrive.

 
steve_rogers42

Malwarebytes, your not AVG, what are you doing, go home, your drunk…

good thing i have been keeping mine updated and only scanning every few weeks… kinda want to keep my assessments lol

 

Hmm now I see this article it reminds me that Malwarebytes detected my hosts file as a trojan about a month ago. I just removed it and rebooted to be safe, especially because the host file is remade.

 

If you don’t want false positives, just use MSE. Also no ads. Also doesn’t interfere with any other software.

Seriously, most AV software should just up and detect it self straight off the bat. How people deal with that pre-installed Norton mess all over their Windows amazes me.

nekosan: Could be worse, I cant remember the name but the was an RPG released at some stage (D&D based IIRC) that would randomly format/brick your hardrive.

As in a cracked version or legit version?

 

ooshp:
Seriously, most AV software should just up and detect it self straight off the bat. How people deal with that pre-installed Norton mess all over their Windows amazes me.

I occasionally do some tech support on friends’ PC’s and Norton is always the first thing to go. Norton does a really good job of stopping viruses… and everything else…

 

ooshp: As in a cracked version or legit version?

Legit version, you would get 2 hours into the game then BAM!

 

nekosan: Could be worse, I cant remember the name but the was an RPG released at some stage (D&D based IIRC) that would randomly format/brick your hardrive.

The very first version of Half-Life released in the US would just delete the parent directory when you uninstalled it.

If u had it in C:\games\halflife you’d lose your whole games directory.

C:\halflife was a tad more hilarious :D

We atleast missed that here, all international versions were 1.0.0.5 on the disk from the get-go

 

The bigger news was what Windows did a few weeks earlier when they bricked Brazilian Windows 7 (why Brazilian, no one knows) machines that downloaded a routine security update…

 
Bane Williams

ooshp:
If you don’t want false positives, just use MSE. Also no ads. Also doesn’t interfere with any other software.

Couldn’t agree more. These days, most ‘Virus scanners’ don’t actually scan for viruses, merely virus like behaviour, which leads to an epic tonne of false positives. MSE at least knows what the hell it’s doing, unlike practically everything else which works on the premise of ‘if we detect more viruses, more businesses will pay us money’.

 

I only use AVG and nothing else, nothing even compares

 
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